The Global Polio Laboratory Network (GPLN) has confirmed the isolation of type 2 vaccine-derived poliovirus (VDPV2) from environmental samples in London, United Kingdom (UK), which were detected as part of ongoing disease surveillance. It is important to note that the virus has been isolated from environmental samples only – no associated cases of paralysis have been detected. Recent coverage for the primary course of DTaP/IPV/Hib/HepB vaccination, which protects against several diseases including polio, in London suggests immunization coverage of 86.6%.
Initially, vaccine-like type 2 poliovirus (SL2) had been isolated from samples taken from the same site between February and May 2022. Genetic analysis suggests that the new VDPV2 and previous SL2 isolates have a common origin, still to be identified, but the technical definition and criteria for ‘circulation’ of VDPV2 are not met at this time. Additional sewage samples collected upstream from the main waste-water treatment plant’s inlet are being analysed.
Investigations and response by the UK Health Security Agency are ongoing to:
assess both origin and risk of circulation associated with these isolates;
strengthen poliovirus surveillance including enterovirus and environmental;
explore routine immunization catch-up of children who are under-immunized, including of families that have recently arrived in the UK from countries with recent use of type 2-containing oral polio vaccine; and,
enhance communications about this incident to health professionals and caregivers.
It is important that all countries, in particular those with a high volume of travel and contact with polio-affected countries and areas, strengthen surveillance in order to rapidly detect any new virus importation and to facilitate a rapid response. Countries, territories, and areas should also maintain uniformly high routine immunization coverage at the district level and at the lowest administrative level to protect children from polio and to minimize the consequences of any new virus being introduced.
Any form of poliovirus anywhere is a threat to children everywhere. It is critical that the GPEI Polio Eradication Strategy 2022-2026 is fully resourced and fully implemented everywhere, to ensure a world free of all forms of poliovirus can be attained.
It’s been a long day for Dr. Nabeel Abdu Omar Ali. Since early morning, he has been going from one house to the next in a community in Aden, Yemen – listening to the concerns of parents and speaking to them about the importance of vaccination to save their children from polio. And he plans to continue till the sun goes down.
“The weather is pleasant now and I want to meet as many parents as possible, especially those who have concerns about vaccines. In a month’s time, the heat and humidity will be unbearable, making it difficult to walk from house to house,” says Dr. Nabeel.
Nicknamed “the mobile imam” by his peers, Dr. Nabeel is a pediatrician by profession, and a certified imam (Islamic teacher) from the Ministry of Endowment in Southern Yemen. He uses his religious knowledge and medical facts to educate the public about the importance of vaccination in protecting children from polio and other deadly diseases.
A few weeks back, he visited several families who were refusing vaccines in a nearby neighborhood. In addition to speaking to them about the safety and benefits of the polio vaccine, the ‘mobile Imam’ administered polio drops to his grandchildren in front of everyone at the community meeting.
“When the people saw a doctor and Imam like me vaccinating my own grandchildren, I think it was easier for them to believe that the vaccine was safe for their children too,” says Dr. Nabeel with a smile.
Reaching out to other Imams for support
Dr. Nabeel frequently reaches out to other Imams, training them about the benefits of vaccination and encourages them to share with the public during their Friday sermons.
“Imams are very influential in our communities – to raise awareness, shape social values, and promote positive attitudes, behaviours and practices. For example, a single sermon is powerful enough to change misconceptions about vaccines in some communities. If Imams are fully equipped with accurate information, it goes a long way in build trust and creating vaccine acceptance among the people – helping children in the community to stay health and free from polio and other vaccine-preventable diseases,” he adds.
The ongoing conflict in Yemen has severely damaged the health and basic infrastructure. There are frequent interruptions in power supply, and this often creates suspicion among community members as well as Imams whether vaccines are being stored safely.
“I was training a group of imams and they shared their doubts about the safety of the vaccine. They were skeptical about how refrigerators could store polio vaccines safely when there are so many power cuts in the area.”
In response, Dr. Nabeel organized a tour for the group to a vaccine storage facility where they were able to see and learn about special refrigerators that are powered by solar energy when there are power cuts.
Promoting the benefits of vaccination for over a decade
Dr. Nabeel has been working for the immunization programme in Yemen for over 12 years, partnering with UNICEF for numerous polio vaccination campaigns and routine immunization services.
When he first started out as pediatrician, he met many children who were paralyzed by polio. He felt frustrated that so many children would have to suffer for the rest of their lives by a disease that could have been easily prevented by a vaccine. That is when he decided to dedicate his time to educate caregivers and parents on the benefits of vaccination.
“There are many misconceptions about vaccines. Throughout my career I have been confronted by people who were resistant to the idea of vaccination. Some people think that the vaccine will make them infertile, while others believe it’s some kind of a conspiracy. However, my many years of work in immunization and knowledge of religious scriptures has proven to be valuable so far in building trust in vaccine in communities,” says Dr. Nabeel.
The ‘mobile Imam’ is also quite adept in working with the media to promote vaccination. He is often seen and heard on TV and radio talk shows speaking about the benefits of vaccination and answering to questions from concerned parents and caregivers.
“I use a mixed approach to address vaccine hesitancy and dispel misinformation about vaccines. Sometimes it is helpful to talk about vaccines during Friday sermon, while other times, it is more effective to explain to a caller on a radio programme why vaccines are important,” he explains with a smile.
Over four days in the middle of May, parents in the governorates of Bethlehem and Jerusalem were urged to take their children under age five to health facilities for a supplementary dose of oral polio vaccine. The aim: boost immunity to poliovirus in the face of increased regional risk.
Unlike most polio campaigns in the Eastern Mediterranean Region, the mechanism for the campaign in occupied Palestinian territory (oPt) was via health facilities, rather than house to house. This can be a major ask for parents, who must organize time and transport to get children to health facilities during a relatively brief window.
Round 1, from Monday 16 May through Thursday 19 May, tested the resolve of a community that is famously pro-vaccine (routine immunization coverage across oPt is typically between 98% and 100%), but like parents everywhere, juggling work, childcare and other commitments.
While most often, mothers took their children for vaccination, in many of the health facilities where vaccination took place, grandmothers were seen supporting mothers or even stepping into their shoes.
“I brought my granddaughters today to take the polio vaccine because their mother is studying in university and their father is working,” said Abeer Nasrallah, who brought Zeina (two) and Mariam (three) to El-Azariyeh, a Palestinian Ministry of Health clinic in Jerusalem governorate.
In Biddo, an area of Jerusalem governorate where the main UNRWA clinic serves both local families and those from more remote regions, a steady stream of clinic visitors climbed out of mini-buses and taxis after lengthy journeys.
“Many Bedouins come to us from remote areas like Bani Samuel and Beit Iksa, although the transportation from their areas is very hard for two reasons. First, the roads are very difficult, and second, there are a lot of checkpoints that could keep you waiting for hours,” said Tamam Taha, a nurse at the Biddo UNRWA health facility.
“We have good numbers of people coming to the clinic, both refugee and non-refugees, and we give the vaccine to all of them,” she said.
One of the groups she served was headed by Samar Al-Sheikh, a mother of one who arrived with three girls in tow.
“I brought my brother’s daughters because he can’t come. Usually, I would walk from my home, but I took public transportation today because I have three kids with me. It was hard to manage them, but it’s important to give them the vaccine,” she said.
In some cases, the hurdles parents faced to bring their children to health facilities were starkly visible.
Nidal Kandeel, father of Janette (three) and Jolan (21 months), arrived at Biddo UNRWA health facility on crutches.
“I got an injury in my work a year ago, and I’m now disabled for the rest of my life. It was hard for me to come to the clinic using public transportation, but I know how important it is for my children to take the polio vaccine, and this is why I am here,” he said.
While the results of this preventative campaign are still pending, clinics promoted the campaign heavily through their own social media groups, and health workers explained that logistics aside, it wasn’t difficult to convince Palestinian parents of the need to vaccinate under-fives.
“There is a lot of demand for this vaccine. Many people have been coming since this morning to get their children to take the vaccine. In the last hour, we have vaccinated more than 100 children,” said Khawla Abu Khdeir a nurse running the registration desk at El-Azariyeh.
Following the four-day vaccination blitz at health facilities, nursing teams will review registers of children vaccinated and cross-reference these with patient lists. Parents of children who weren’t vaccinated will be telephoned and efforts made to reach those children through in-clinic follow-up or outreach.
Round two of the bivalent oral polio vaccine (bOPV) campaign is expected in mid to late June, with the aim of raising immunity levels in these two governorates.
Palestine has been polio-free for more than 25 years, thanks to a robust routine immunization programme and a strong culture of vaccine acceptance.
But following the detection of circulating vaccine-derived poliovirus type 3 (cVDPV3) in sewage outflow in Wadi Alnar site, a junction between wastewater coming from inside the green line with wastewater coming from Bethlehem and Jerusalem, the Palestinian Ministry of Health launched efforts to boost immunity in the areas deemed most at risk.
The campaign was carried out with support from WHO, UNICEF and UNRWA’s Palestine country offices.
WHO’s Palestine office provided technical support to the Ministry in planning and executing this campaign, drawing on the extensive expertise of our regional polio eradication programme.
The vaccination campaign in Palestine is part of the global effort to eradicate poliovirus, spearheaded by the Global Polio Eradication Initiative.
In this two-part video series, we chat with Dr Ananda Bandyopadhyay, Deputy Director of Polio Technology, Research & Analytics, BMGF, about the new tool in GPEI’s kit to combat cVDPV2: novel oral polio vaccine type 2 (nOPV2).
As a result of ongoing disease surveillance, the Global Polio Laboratory Network (GPLN) has confirmed that a child in Changara district, Tête province, Mozambique, was paralyzed by type 1 wild poliovirus (WPV1).
The child experienced onset of paralysis on 25 March 2022, and sequencing of the virus confirms that it is linked to the imported WPV1 case confirmed in Malawi in February.
While this detection of another WPV1 in the southeast Africa region is a concern, it is not unexpected following the Malawi detection in February and further underscores the importance for all countries to prioritize immunization of children against polio.
Mozambique has participated in the multi-country coordinated vaccination campaigns in response to Malawi’s imported WPV1, with two vaccination rounds already conducted. The most recent took place at end of April, with 4.2 million children vaccinated across the country, and the Global Polio Eradication Initiative (GPEI) is supporting countries to strengthen disease surveillance and prepare for the remaining two campaign rounds. These will cover Malawi, Tanzania, Mozambique and Zambia, with Zimbabwe joining the later rounds to ultimately help reach over 23 million children under five years with polio vaccine by end of August 2022.
Mozambique last recorded a case of wild polio in 1992 though the country has more recently been affected by an outbreak of circulating vaccine-derived poliovirus type 2 (cVDPV2). Three cases have been detected since April 2021 and vaccination campaigns in response to the outbreak are continuing, which include use of the novel oral polio vaccine type 2 (nOPV2).
Wild polio remains endemic in just two countries – Pakistan and Afghanistan. The WPV1 detection in Mozambique does not affect the WHO African Region’s wild poliovirus-free certification status officially marked in August 2020, as the virus strain originated in Pakistan. However, any child paralysed by polio is one too many. The polio eradication programme has seen importations from endemic countries to regions that have been certified wild poliovirus-free in the past and has moved quickly to successfully stop transmission of the virus in these areas.
Polio anywhere is a threat to children everywhere. It is vital that all parties ensure that the GPEI has the support it needs to implement its five-year eradication Strategy in full and ensure no child is paralysed by polio ever again.
On Monday 16 May, the Palestinian Ministry of Health will launch round one of a polio vaccination campaign targeting all children under age five in Bethlehem and Jerusalem.
The vaccination campaign is scheduled to run over three days: Monday 16 May through Wednesday 18 May 2022. Vaccination, using bivalent oral polio vaccine (bOPV), is free and will be offered at maternal and child centres and UNRWA centres throughout Bethlehem and Jerusalem.
Palestine has been polio-free for more than 25 years, thanks to a robust routine immunization programme and a strong culture of vaccine acceptance. But following the detection of circulating vaccine-derived poliovirus type 3 (cVDPV3) in sewage outflow in Wadi Alnar site, where there is a junction between wastewater coming from inside the green line with wastewater coming from Bethlehem and Jerusalem, the Ministry of Health has taken the decision to launch a preventative vaccination campaign to boost children’s immunity in the two areas deemed most at risk: Bethlehem and Jerusalem.
“It is all of our duty to keep Palestine polio-free by making sure that our children under the age of five receive the polio vaccine every time it is offered. I encourage every parent to make it a priority to vaccinate their children – for their sake, and for Palestine,” said Dr Mai al-Kaila, Minister of Health, Palestine.
The vaccination campaign is being carried out with support from WHO, UNICEF and UNRWA’s Palestine country offices.
“WHO’s Palestine office has provided technical support to the Ministry in planning and executing this campaign, drawing on the extensive expertise of our regional polio eradication programme. Palestine is in a strong position thanks to its routine immunization programme and to the value Palestinian parents put on childhood immunizations, but the regional risk of polio is increasing and it is absolutely crucial that we reach and vaccinate every child under age five in the target areas,” said WHO occupied Palestinian territory Representative Dr Rik Peeperkorn.
“It is critical that every child can access their right to a life free from polio and other vaccine-preventable diseases. UNICEF and its partners in this campaign are making every effort to ensure no child in Palestine will be affected by this debilitating disease. It is a duty upon all of us to keep Palestine polio free,” said UNICEF’s Special Representative to the State of Palestine Lucia Elmi.
Round two of the campaign will take place in June and will offer all children under age five a second two drops of polio vaccine, further boosting their immunity. Children living outside of Jerusalem and Bethlehem do not currently require an additional dose of oral polio vaccine. If their routine immunizations are up to date, they are well protected from poliovirus and other vaccine-preventable diseases.
Poliovirus primarily affects children under age five and can lead to lifelong paralysis. It can easily be prevented through vaccination. Parents are urged to accept polio vaccines every time they are offered.
The vaccination campaign in Palestine is part of the global effort to eradicate poliovirus, spearheaded by the Global Polio Eradication Initiative.
It is a hot afternoon in Chagai, a small community on the south bank of the River Gambia when the polio vaccination team arrives to a rapturous welcome. Children and women jump to their feet, some waving and swinging their hands as they pound their feet on the ground in near perfect sync with the beat of the drum.
This excitement is caused by one certain member of the vaccination team wearing a bush hat and playing the drums. Lamin Keita, 60, is a cultural musician supporting the vaccination team in raising awareness about polio and encouraging parents to vaccinate their children. Lamin, popularly called Takatiti, because of one of his songs, is immediately surrounded by excited children, as he adjusts his beats to respond to the ecstasy and rigor of the dancers.
“When I arrive on the back of a pick-up truck with my megaphone and drums, children from the communities run after us in full excitement and jump up and down and ask me to play my drums,” Takatiti explains.
This is what Takatiti is popular for – pulling crowds with his drums to communicate important messages like polio vaccination. For almost four decades, he has toured communities in the region, accompanying health workers as they seek to persuade parents and caregivers to vaccinate their children during mass vaccination campaigns like the polio campaign.
Local voices are the most powerful voices
Building trust in vaccines among parents and caregivers is the first critical step towards achieving high immunization coverage to stop the spread of polio. UNICEF, as a leading partner of the Global Polio Eradication Initiative (GPEI) for social and behaviour change, supports the government in strengthening engagements with communities, as the voices of local leaders and influencers like Takatiti play a powerful role in helping allay fears and concerns of parents and caregivers about vaccines.
“I have been making town announcements since the mid-1980s. I am aware of polio and its terrible consequences. Families hear myths and rumours and get concerned about vaccines. As they already know and trust me, I try my best to give them accurate information and clear their doubts, so that they can vaccinate their children against polio and other dangerous diseases,” Takatiti says.
“It’s important to deliver messages that are supported by facts in an effective way”
Days before the start of a polio vaccination campaign and during the campaign itself, Takatiti walks up and down the streets of villages, playing his drums and using his megaphone to talk to communities about the dangers of polio, how vaccination is the only way to protect children, and that polio vaccines are safe and free.
“I always try to promote peace and healthy life for all. It’s important to deliver messages that are supported by facts in an effective way. The Government and UNICEF provided me correct information and facts about polio and vaccines, so I am happy to volunteer for the campaign.”
A country mobilizes to stop polio
“If people trust health workers to cure other diseases, then it makes sense to trust the same health workers to protect our children from polio. Health workers even give the polio vaccine to their own children – so we should not doubt their good intentions. It is my job to let people know this truth, without offending them, and encourage them to vaccinate their kids,” Takatiti said.
In August 2021, The Gambia declared a national public health emergency in response to outbreaks of non-wild variants of polio in the country.
The Gambian government, with support from WHO, UNICEF, US Centres for Disease Control and Prevention (CDC)and GPEI partners, quickly responded and started preparing for nationwide immunization campaigns – managing supply and safe storage of vaccines, strengthening surveillance and monitoring, training health workers and vaccinators, and engaging with local leaders and influencers to build trust in vaccines.
The country undertook its first national polio vaccination campaign in November 2021 and followed up with a second round in March 2022.
Thanks to thousands of health workers, vaccinators, and community influencers like Takatiti, the vaccination campaigns have reached over 380,000 children aged five years and below in The Gambia.
Infectious diseases like poliomyelitis (polio) know no borders. Importation and subsequent spread of the virus led to the paralysis of 34 children, and 26 others tested positive without developing symptoms of paralysis. Extensive immunization efforts began in February 2021, and no child, adult or environmental sample in Tajikistan has tested positive since August 2021.
The outbreak in Tajikistan marked the first detection of circulating vaccine-derived poliovirus type 2 (cVDPV2) in the WHO European Region. It is now the first cVDPV2 outbreak in the world to be declared officially closed following supplemental immunization using the novel oral polio vaccine type 2 (nOPV2).
The Region has been free of endemic poliovirus since 2002. Detection of just 1 case of polio – whether from a wild or vaccine-derived poliovirus – is considered an outbreak, and requires an immediate and comprehensive response.
“Tajikistan’s success in stopping this outbreak is a major achievement and a clear demonstration of the highest level of political commitment of the Government of Tajikistan,” says Dr Hans Henri P. Kluge, WHO Regional Director for Europe.
“This outbreak and the subsequent response came at a time when the health system was already overstretched by the COVID-19 pandemic and the country was mounting a massive COVID-19 vaccination drive. Both outbreak responses had to be done without disrupting the vitally important provision of other routine vaccines to children. We acknowledge the efforts of the Ministry of Health over the past several years, which resulted in a resilient immunization system able to successfully manage all these competing immunization priorities.”
Actions taken to stop the outbreak
Following confirmation of the outbreak, the Ministry of Health and Social Protection of the Population took immediate steps, with support and guidance from WHO and other Global Polio Eradication Initiative partners. Actions included enhanced poliovirus surveillance, intensive contact tracing and a thorough review of immunization coverage at subnational levels. A rigorous risk assessment was conducted to determine the outbreak response scale and choice of vaccine, and the country rapidly completed a comprehensive verification process for readiness to use the nOPV2 vaccine.
In February 2021, a high-quality nationwide inactivated polio vaccine campaign was conducted to close the immunity gap against poliovirus type 2 among the more than half a million children born from 2016 to 2018 who had been left vulnerable as a result of global inactivated polio vaccine (IPV) supply constraints following cessation of trivalent oral polio vaccine use.
From June to September 2021, 2 nationwide and 1 subnational nOPV2 immunization rounds were implemented for all children under 6 years of age, with coverage confirmed (through external assessment) to be greater than 95%. Extensive social mobilization and communication strategies were deployed to reach groups who were at risk of being missed, including internal migrants in urban areas and unregistered children.
Assessment of the outbreak response
Several criteria must be met to officially close an outbreak, including at least 6 consecutive months in which no poliovirus is detected. The independent experts of the Global Polio Eradication Initiative who conducted the assessment in Tajikistan also looked at the performance of routine polio vaccination, the coverage achieved during the supplemental immunization rounds, and the capacity and sensitivity of the polio surveillance system to detect any poliovirus circulation.
Following the thorough assessment, which included briefings at the national level and field visits to national referral hospitals, public hospitals, polyclinics, regional and district immunization programme offices, and public health centres, the team recommended closure of the outbreak.
nOPV2 – a new chapter in global efforts to eradicate polio
Ending this outbreak using nOPV2 is an important milestone for the global polio programme. The innovative vaccine is a key part of the new strategy to stop cVDPV2s. Clinical trials show that nOPV2 is safe and effective, and more genetically stable than the traditional type 2 oral polio vaccine.
Since the rollout of nOPV2 began in March 2021, over 265 million doses have been administered across 14 countries. The majority of countries using the vaccine have also managed to stop transmission of cVDPV2; however, this is the first official closure of an outbreak to take place following nOPV2 use.
In addition to successfully halting transmission and lowering the risk of infection for millions of people, Tajikistan contributed to global research on nOPV2 with the support of WHO through an nOPV2 immunogenicity study. The country also participated in a global vaccine wastage study.
On 21 March, the Federal Government of Somalia, World Health Organization (WHO) and members of the Global Polio Eradication Initiative (GPEI) recommitted to stopping the ongoing outbreak of circulating poliovirus type 2 (cVDPV2) in Somalia at a three-day meeting convened in Nairobi, Kenya. High-level delegates at the meeting included HE Fawziya Abikar Nur, Federal Minister of Health and Human Services, Dr Mamunur Rahman Malik, WHO Representative to Somalia and Head of Mission, alongside senior representation from the Bill & Melinda Gates Foundation (BMGF), the Centers for Disease Control and Prevention (CDC), Rotary International, Save the Children, the United Nations Children’s Fund (UNICEF), and other UN agencies and partners.
Together, the Government, GPEI partners, which include WHO, UNICEF, the BMGF, CDC, Rotary International, GAVI, the Vaccine Alliance, and other key partners endorsed the Somalia Polio Eradication Action Plan 2022 to reaffirm their commitment.
The Somalia Polio Eradication Action Plan 2022 outlines a four-point call to action to stop the spread of the current outbreak, which is one of the longest lasting cVDPV2 outbreaks to be reported so far. The robust plan aims to direct partners’ efforts and resources towards boosting population immunity, making concerted efforts to reach high-risk populations — including inaccessible and nomadic communities and internally displaced persons — to strengthen their immunity, enhancing the search for poliovirus circulation, and strengthening coordination among all stakeholders. Some of the strategies that will be deployed include intensifying efforts to offer 5 opportunities for vaccination against polio in 2022, providing routine childhood immunization in high-risk locations, where children have missed out on vaccinations, and strengthening community engagement. Given how easy it is for the cVDPV2 virus to spill over international borders, the emergency plan also advocates for stronger cross-border coordination among the polio eradication programmes in Somalia, Kenya, Ethiopia and Djibouti.
“In the midst of the ongoing drought, and while recovering from the effects of the COVID-19 pandemic, our stakeholders must not forget how important it is to contain the ongoing poliovirus outbreak so that it does not spread any further and does not affect any more children’s lives,” said HE Fawziya Abikar Nur, Federal Minister of Health and Human Services. “On this occasion, I would like to extend my sincere gratitude to all our partners, and donors, for the immense efforts they have put into shielding millions of Somali children from polio over the years.”
“Since its inception 25 years ago, Somalia’s polio eradication programme has made progress, including by stopping outbreaks of wild poliovirus and, recently, one of circulating poliovirus type 3 in 2021. The programme has established a vast network of polio workforce and assets and we can do more not only to stop the current outbreak but to achieve broader health system goals through integration and effective use of our human and operational resources. Since 2018, Somalia has conducted several supplementary immunization campaigns. Despite these efforts, pockets of unvaccinated children remain, due to insecurity and limited access to health services,” said Dr Mamunur Rahman Malik, WHO Representative to Somalia.
The Somalia Polio Eradication Action Plan, which will be implemented in 2022, complements one of the goals outlined in the GPEI ‘Polio Eradication Strategy 2022–2026: Delivering on a Promise’, to stop cVDPV transmission and prevent outbreaks in non-endemic countries. It is also in line with Somalia’s national goals and UN Sustainable Development Goals (SDGs).
17 March 2022 — On Monday 7 March 2022, a case of circulating vaccine-derived poliovirus type 3 (cVDPV3) was confirmed in an unvaccinated girl aged three years and nine months in Israel. The girl had developed acute flaccid paralysis and upon testing of her stool, poliovirus was confirmed.
Further testing of the virus isolated from the girl revealed genetic links to VDPV3-strains detected in environmental samples collected between September 2021 and January 2022 from sites in Jerusalem and Bethlehem.
Circulating VDPV3 has also been confirmed in a sample taken from a contact in Jerusalem. This child does not display any symptoms of paralysis.
A previous statement published on 10 March 2022 had indicated circulation of this VDPV3 also in occupied Palestinian territory; further field investigations concluded that at this time, circulation can only be confirmed in Israel. This classification does not however change the risk this cVDPV3 presents to children in Israel and in the occupied Palestinian territory, nor the planned response activities.
Although there is currently no evidence of circulation of this cVDPV3 in occupied Palestinian territory, the proximity and interconnectedness of communities on both sides of the border and the volume and frequency of cross-border population movement underscore the risk to unvaccinated children in both places.
Local health authorities in both Israel and occupied Palestinian territory are conducting field, epidemiological and virological investigations, to determine more clearly the source and origin of the isolated virus and potential risk of further spread associated with it. Discussions are ongoing to plan an immunization response as appropriate (extent and scale to be determined, potentially to include a series of immunization outreaches with both inactivated polio vaccine and bivalent oral polio vaccine, both in high-risk areas of Israel and occupied Palestinian territory). At the same time, efforts are continuing to strengthen surveillance comprehensively in both Israel and occupied Palestinian territory.
Experts from headquarters, regional and country offices of the Global Polio Eradication Initiative (GPEI) partnership, which includes WHO, Rotary International (RI), the US Centers for Disease Control and Prevention (CDC), the United Nations Children’s Fund (UNICEF), Bill & Melinda Gates Foundation (BMGF) and Gavi, the Vaccine Alliance, are working together to help ensure an appropriate response and cessation of this outbreak.
Detection of this cVDPV3 underscores the importance of strong disease surveillance and high population immunity levels, in order to minimize the risk and consequences of any poliovirus introduction or emergence.
The GPEI partnership urges all health authorities to enhance surveillance for poliovirus and implement enhanced vaccination response to prevent further transmission, so that no child is at risk of lifelong paralysis from a disease that can so easily be prevented. GPEI is committed to assisting the health authorities in their efforts to stop the cVDPV3 outbreak.
Yemen is currently experiencing twin outbreaks of circulating vaccine-derived poliovirus type 1 and type 2 (cVDPV1 and cVDPV2). Both strains of poliovirus emerge in populations with low immunity and both can result in lifelong paralysis and even death.
Since 2019, 35 and 14 children have been paralysed by cVDPV1 and cVDPV2 respectively, three of the cVDPV2 cases confirmed in the past 10 days alone. The cVDPV2 outbreak, in particular, is ongoing and expanding and has already spread to other countries in WHO’s Eastern Mediterranean Region and UNICEF’s Middle East and North Africa Region. At its fourth meeting on 9 February 2022, the Eastern Mediterranean Ministerial Regional Subcommittee on Polio Eradication and Outbreaks issued a statement, expressing deep concern around these expanding outbreaks and requesting all authorities in Yemen to facilitate resumption of house-to-house vaccination campaigns in all areas.
The Global Polio Eradication Initiative (GPEI) partners strongly recommend high-coverage mass vaccination campaigns to stop a cVDPV outbreak. The vaccination response must achieve at least 90% of children vaccinated repeatedly with polio vaccine to protect them from polio and prevent seeding new vaccine-derived emergences. Therefore, the guidelines in the Polio Outbreak Response Standard Operating Procedures recommend that the vaccination response to polio outbreaks should be conducted using the house-to-house vaccine delivery strategy to maximize coverage of vulnerable children.
The GPEI urges the health authorities in Sana’a to conduct high quality house-to-house vaccination campaigns to stop the two concurrent outbreaks as soon as possible. If the current conditions in parts of Yemen do not permit house-to-house vaccination, then an intensified fixed-site vaccination campaign with appropriate social mobilization by the community and religious leaders trusted by the local communities should be implemented to maximize coverage among all vulnerable children.
Yemeni children face no shortage of threats: prolonged conflict, a devastated healthcare system, hunger and disease. But polio is one disease that can easily be prevented. Its circulation can be stopped in Yemen or anywhere else by vaccinating all children with oral polio vaccine.
The GPEI partners – WHO, Rotary International, the U.S. Centers for Disease Control and Prevention, UNICEF, the Bill & Melinda Gates Foundation and Gavi – are committed to providing support to all stakeholders in Yemen for responding to the polio outbreaks including in conducting polio vaccination campaigns that can reach all vulnerable children.
The Global Polio Eradication Initiative (GPEI) is extremely concerned about the unfolding effects of the current crisis in Ukraine on the country’s health system. A functioning health system must be kept neutral and protected from all political or security issues affecting countries, to ensure that people have continued access to critical and essential care.
At the same time, we have seen time and again that large-scale population movements, insecurity and hampered access contribute greatly to the emergence and/or spread of infectious diseases, such as polio.
A national supplemental polio immunization campaign targeting nearly 140,000 children throughout Ukraine who had not been vaccinated against polio began on 1 February 2022, but is currently paused, as health authorities have shifted focus towards emergency services. Surveillance to detect and report new cases of polio is also disrupted, increasing the risk of undetected spread of the disease among vulnerable populations. The GPEI is working to urgently develop contingency plans to support Ukraine and prevent further spread of polio.
The GPEI has a long history of working in a variety of complex environments, and will continue to adapt its operations to the reality on the ground, to the degree possible, without compromising on the safety and security of health workers. At the same time, immunization and surveillance is being assessed in neighbouring countries, to minimize the risk and consequences of any potential infectious disease emergence/spread resulting from the current large-scale population movements. It is critical that necessary resources are mobilized and made available to assist with the humanitarian needs, including relief, disease response/prevention efforts both in Ukraine and in neighbouring countries.
Cairo, 10 February 2022 – The fourth meeting of the Regional Subcommittee on Polio Eradication and Outbreaks was convened on Wednesday 9 February, by WHO’s Regional Director for the Eastern Mediterranean Dr Ahmed Al-Mandhari. The meeting was attended by health ministers or their representatives from Djibouti, Egypt, the Islamic Republic of Iran, Pakistan, Qatar, Saudi Arabia, Sudan, United Arab Emirates and Yemen.
The Subcommittee declared the ongoing circulation of any strain of poliovirus in the Region to be a regional public health emergency and called on all authorities to enable uninterrupted access to the youngest and most vulnerable children through the resumption of house-to-house vaccination campaigns. It issued statements on wild poliovirus circulation in Afghanistan and Pakistan and on the circulation of vaccine-derived poliovirus strains in Yemen, where limits on house-to-house vaccination are preventing access to the most vulnerable children.
The spread of polio in the Eastern Mediterranean Region is a pressing emergency and it remains a Public Health Emergency of International Concern (PHEIC) under the International Health Regulations (IHR 2005).
Members noted a sharp decrease in cases of wild poliovirus in Afghanistan and Pakistan in 2021 but warned against complacency.
“Wild poliovirus transmission is at a historic low in the endemic countries of Afghanistan and Pakistan. The progress is remarkable, but it is fragile. The opportunity to end polio is knocking at our door, and we must seize it,” said Dr Al-Mandhari.
Speaking to the progress made in the last year, the Special Assistant to the Prime Minister on Health, Dr Faisal Sultan, assured members that the programme in Pakistan was leaving no stone unturned in the pursuit of zero polio transmission.
“We have intensified efforts in the hardest districts and core reservoirs and we are closely monitoring transmission across the border in coordination with Afghanistan, taking measures to respond to outbreaks if they occur and making every effort to ensure that the virus doesn’t spill over in either direction. To boost the confidence of marginalized communities, we are also providing essential services and vaccination of other antigens and diseases,” he said.
Outbreaks of circulating vaccine-derived polioviruses type 1 (cVDPV1) and type 2 (cVDPV2) continued to emerge and spread in the Region in 2021. As of February 2022, Afghanistan, Djibouti, Egypt, Pakistan, Somalia, Sudan and Yemen are responding to transmission of vaccine-derived polioviruses.
“The increasing outbreaks of circulating vaccine-derived poliovirus type 2 in the Eastern Mediterranean Region and neighbouring countries of Africa are deeply concerning and must be stopped rapidly. To do so, we need to ensure that we are creating an enabling environment for health workers to reach children with those two drops of polio vaccine,” said newly nominated co-chair H.E. Dr Hanan Mohamed Al Kuwari, Minister of Public Health of Qatar.
During the meeting, Djibouti’s Public Health Minister, Dr Ahmed Robleh Abdilleh, shared plans for vaccination campaigns and increased surveillance in response to the transmission of cVDPV2, recently detected through the newly launched environmental sampling programme.
Reflecting on the work of the Subcommittee, co-chair and Minister of Health and Prevention of the United Arab Emirates H.E. Abdul Rahman Mohammed Al Owais urged members to sustain the commitment seen in in 2021.
“We have together advocated for an increase in domestic funds, we have driven collaborative public health action in our own countries, and collectively pushed for a regional response to address the regional public health emergency of the poliovirus. But these things alone will not end transmission,” he said.
Dr Al-Mandhari expressed appreciation for Egypt’s role as the first country in the Region to roll out a nationwide vaccination campaign using the novel poliovirus vaccine, and Chris Elias, Chair of the Polio Oversight Board, praised the remarkable progress made in polio eradication in Pakistan with support of the United Arab Emirate’s Pakistan Assistance Programme.
“This regional solidarity and commitment we have seen, through this Subcommittee, is something I am proud of. It is this commitment to the end goal that will help push us over the last mile,” said Dr Hamid Jafari, director of the regional polio programme and co-facilitator of the Regional Subcommittee.
Dr Pascal Mkanda, Director for the Polio Eradication Programme in the World Health Organization’s Regional Office for Africa (AFRO), also famously known as our ‘villager in polio’, is this month (February 2022) entering a well-deserved retirement. Pascal’s contribution over the years to polio eradication in Africa, and indeed broader immunization, is second to none.
Under Pascal’s stewardship and leadership, wild polioviruses were successfully eradicated from the continent, the polio infrastructure integrated into broader public health efforts, new technologies and innovations for reaching the most marginalized children established and new vaccines successfully rolled-out. His expertise, knowledge, dedication, zeal, and passion to work and more importantly his mentorship to fellow colleagues and health workers to alleviate the lives of vulnerable children across the continent, will be sorely missed.
“I have worked with Pascal for close to 7 years, and during that time, I have witnessed first-hand Pascal’s dedication, and what he often refers to as ‘tough’ decision making, which we owe to the successes we have seen in the polio program” said Dr Matshidiso Moeti, WHO Regional Director for Africa.” My first interaction with Pascal was during the first meeting for Program Managers in the region, in Johannesburg, South Africa, in 2016. During this meeting Pascal expressed very passionately that the only way we can get results in Polio is by holding everyone accountable. To use his words, global health, very much like soccer, requires a coach to put his best players on the field. Throughout the continent, children are healthier and better protected from infectious diseases, most notably of course from polio, thanks to the tremendous efforts and tireless work of Pascal. This continent owes a huge debt of gratitude to Dr. Mkanda. On behalf of all mothers of Africa, I can simply only say one thing: Thank you, Pascal!”
“Rotary and Rotary members across Africa have been at the forefront in the fight against polio since President Nelson Mandela shouted his rallying call in 1996 to ‘Kick Polio Out of Africa’,” according to Dr Tunji Funsho, Chair of Rotary’s Nigeria National PolioPlus Committee and one of TIME Magazine’s 100 Most Influential People in 2020. “We went from 75,000 children paralyzed each year, all over Africa in 1996, to Zero wild polio cases since 2016. An unparalleled public health achievement, which could not have happened without Pascal’s leadership, engagement, and expertise. On behalf of Rotary members across Africa, Pascal – thank you so much for everything that you have done. We all wish you a more than well-deserved retirement.”
“I can only echo what others have already said,” commented Professor Rose Leke, Chair of the African Regional Certification Commission, which independently certified Africa as wild poliovirus free in 2020. “It was my great honour, and together with my fellow Commission Members, to certify our continent free of all wild polioviruses. Dr Mkanda and his team across the continent were absolutely instrumental in this. As Director of Polio in the Region, he exhibited great leadership. He and his team helped us verify the absence of wild poliovirus, even from the most inaccessible and remote areas of Africa. They helped ensure that children everywhere, no matter where they lived, were reached with the life-saving polio vaccine. Dr Mkanda demonstrated truly the best of Africa. All I can say is a tremendous ‘thank you’ to him and his team. I wish him well in all his future endeavours.”
Dr Mkanda’s career started from humble beginnings in a small and remote village, Chintheche in northern Malawi, with virtually no infrastructure. Pascal, son of a stay-home mother and a primary school teacher in Nkhata Bay, started making ‘tough decisions’ very early in life. At a tender age of 13, he and his elder brother Justin left their home on foot, and walked 18 miles with no shoes, to look for what would eventually be their family’s home in search of a better education for him and his siblings.
This was only the beginning of the ‘tough decision making’ that Dr Mkanda is well-known for today. The young Pascal Mkanda continued with his education and was eventually identified as his district’s best performing student. At the time, the president of Malawi, His excellency Dr Hastings Kamuzu Banda, had initiated a programme offering the brightest pupils (top 2.5%) from each district in Malawi irrespective of sex or socio-economic status, the opportunity to attend higher education, at the prestigious Kamuzu Academy, and through this educational opportunity, Dr Mkanda performed exceptionally and was awarded a full sponsorship to study Medicine in the United Kingdom where he attained a medical degree at the Imperial University College London.
To just show how intelligent he was – Pascal was afforded an opportunity to also study for a degree in microbiology/infectious diseases at the London School of Hygiene and Tropical Medicine while at the same time pursuing a degree in medicine. In later life he went to the Rollins School of Public Health at Emory University in Atlanta, USA, and obtained a Master of Public Health.
Putting his theoretical knowledge into practical experience, it was not long before Dr Mkanda began making a very real impact on Malawi’s public health system, improving the health and lives of remote communities. He rapidly developed a reputation for solid, practical and effective work. Here he developed the traits that would characterize his entire career and for which he became so respected: the courage of standing up for his convictions; an ability to identify and promote new and excellent talent, that would help him establish relevant and pragmatic support teams across the region; a fearless dedication to step out of group thinking even if it meant standing alone against adversity; and, an absolute and unwavering commitment to achieving results.
Respected by peers and more importantly communities themselves, he rapidly caught the attention of the international development community while working in some of the most remote communities in Malawi. During a visit by the USAID Mission in Malawi to Nsanje District Hospital in the south of Malawi, Dr Mkanda’s work caught the attention of the Country Representative who immediately recommended him for a USAID-sponsored Global Health Programme which subsequently led to the beginning of his international career.
Starting out as a National Programme Officer in Malawi for the World Health Organization, and moving on to Zambia as an international staff, he met and established a long-term friendship with Dr Francis Kasolo (former VPD Regional Virologist). By the year 2000, Dr Mkanda was managing immunization activities for Eastern and Central Africa and would eventually lead polio activities in Nigeria and Ethiopia.
It was during his time as WHO Polio team leader in Nigeria and Ethiopia that these countries were able to make significant inroads in interrupting wild polio transmission. One contributing factor for this achievement was the introduction of the famous accountability framework that held every staff accountable for their work with those underperforming being replaced by “fresh legs on the football field”, in Pascal’s own words.
It was therefore not a surprise that when the position of WHO African regional polio coordinator was advertised, that Dr Moeti – then the new Regional Director for Africa – appointed Pascal to lead the fight against this disease in the Region.
Never losing focus on the need to reach every last child with polio vaccines, with support from Dr Moeti and the Bill and Melinda Gates Foundation, Dr Mkanda established a regional center for the Geographic and Information Systems (GIS). According to Dr Joseph Cabore, Director of Programme Management at WHO’s African Regional Office: “One very critical contribution by Pascal to the regional office, is the introduction of innovative technologies and solutions. It’s amazing to see in real time, where our frontline workers can reach during mass campaigns and outreach activities. Pascal, thank you for ensuring that we remain accountable to our African children and their families.”
“It has been a privilege to work alongside Dr. Mkanda in pursuit of a polio-free world,” said Dr. Chris Elias, President of Global Development, the Bill & Melinda Gates Foundation. “His commitment and dedication to eradicating polio have been vital to helping protect millions of children from this debilitating disease and helped achieve a WHO African Region that is now free of wild polio – a monumental achievement in global health. I am forever grateful to Dr. Mkanda for his work and partnership on ending polio.”
Michael Galway, Deputy Director Polio at the Bill & Melinda Gates Foundation, added this personal comment: “Working with Pascal over the past decade has been one of best parts of the job in helping to get rid of polio in Africa. I’ve always appreciated the passion and conviction he’s brought to the work, and his keen understanding of how to get the polio programme to perform at its best in some of the most difficult places. He’s been a role-model and a friend, and I’m grateful for both!”
It was in Nigeria – for a long time the global epicentre for polio – that Pascal’s leadership really came into its own.
Dr Faisal Shuaib, Executive Director of the National Primary Healthcare Development Agency in Nigeria, said: “Pascal Mkanda’s contribution to making Nigeria free of wild poliovirus cannot be overstated. It took innovative strategies and approaches to ensure that every child could be reached, and virus transmission effectively tracked, in hard-to-reach and inaccessible areas. Pascal helped develop and trailblaze novel approaches which ultimately led to our success. It really took rewriting the strategic rulebook, and these approaches are now being implemented in other high-risk polio areas. All for the benefit of the most marginalized children. Thank you, Pascal, we could not have done it without you and your leadership. We will miss you!”
Indeed, it is this same leadership by Dr Mkanda that led to the establishment of the Rapid Response Team (RRT), coordinated by Dr Ndoutabe Modjirom in the WHO Regional Office in Brazzaville to tackle the remaining form of polio, the circulating vaccine-derived polioviruses (cVDPVs): “Pascal, you are leaving big shoes to fill. We will need your kind of leadership to end all remaining forms of polio in our region once and for all. It will not be easy to finish this job without you.”
Pascal will be missed, as underscored by Aidan O’Leary, Director for the Global Polio Eradication at WHO Geneva. “On behalf of all partners and stakeholders, the Global Polio Eradication Initiative wishes you all the very best in your retirement and/or in your next chapter of life. We know of course that you will stay engaged in one capacity or another in this fight, and we look forwards to one day, very soon, to celebrate together with you the victory over all forms/types of polio worldwide once and for all. A big thank you, in particular for your leadership in certifying the Region free of wild polioviruses and for facilitating the introduction and roll-out of novel oral polio vaccine type 2.”
Congratulations on your retirement! Now you’ll have more time for sleeping in, fishing, reading, golfing and if you want to be a DJ-from G22, where it all started!
Shine on, le Mystique Dr Mkanda!
A poliomyelitis (polio) vaccination campaign for children aged 6 months to 6 years who missed routine polio doses in the past will begin in Ukraine on 1 February 2022. This catch-up campaign is part of a comprehensive response to stop an outbreak of poliovirus first detected in Ukraine in October 2021. This first stage will last 3 weeks and is expected to reach nearly 140 000 children throughout the country.
Years of low immunization coverage in Ukraine have created a large pool of unvaccinated or under-vaccinated children who are vulnerable to polio. While routine immunization coverage has gradually increased over the past 6 years, in 2020, only 84% of 1-year-olds received the required 3 scheduled doses of polio vaccines by 12 months of age.
The immediate goal of the campaign is to reach the WHO-recommended level of 95% vaccination coverage of eligible children.
The polio outbreak in Ukraine was confirmed on 6 October 2021. Poliovirus (circulating vaccine-derived poliovirus type 2) was first isolated in a 17-month-old girl in the province of Rivne who developed acute flaccid paralysis. Analysis of all her contacts found that 7 household contacts (siblings) and 8 community contacts in Rivne as well as 4 cousins in the province of Zakarpattya (who had had contact with the girl’s siblings) also tested positive, but did not develop paralytic symptoms.
A second case with acute flaccid paralysis (a 2-year-old boy in the region of Zakarpattya) also tested positive for poliovirus, with onset of paralysis in December 2021.
The isolated strain of the virus found in both paralytic cases and their contacts is linked to a poliovirus in Pakistan, which was also the cause of several cases in Tajikistan in 2020–2021.
Comprehensive plan to stop the spread of poliovirus
Following an initial local vaccination campaign, conducted where the first case was detected, a comprehensive polio outbreak response plan was approved by the Ministry of Health in December 2021.
The first stage of the plan will provide inactivated polio vaccine (IPV) to children aged 6 months to 6 years who have not received the required number of doses. In the second stage, all children under the age of 6 will be vaccinated with oral polio vaccine (OPV), even if they have received all their scheduled vaccination doses. This is necessary to protect children from infection and to stop the circulation of the virus. Dates for the second stage are pending.
With the ongoing COVID-19 pandemic, continued wild polio transmission in the remaining endemic countries and spreading outbreaks of circulating vaccine-derived polioviruses type 2 (cVDPV2), this year began with many challenges facing polio eradication efforts. But amid this new reality, countries and partners of the Global Polio Eradication Initiative (GPEI) intensified their efforts to protect children from lifelong paralysis.
In June, the GPEI launched the new GPEI Strategy 2022-2026, which lays out the roadmap to achieving a lasting world free of all forms of polioviruses through stronger community engagement, a renewed focus on gender equity and the rollout of new tools and technologies. These new tools include the novel oral polio vaccine type 2 (nOPV2), which began deployment under Emergency Use Listing (EUL) as part of the GPEI’s broader polio vaccine repository to curb cVDPV2 transmission. In August, the WHO African Region celebrated one year since it was certified wild polio-free, and countries recommitted to strong cVDPV2 outbreak response across the continent with the support of the GPEI.
Further critical progress took place in Afghanistan – one of two final countries endemic for wild poliovirus, along with Pakistan. For the first time in more than three years, nationwide polio immunization campaigns resumed across Afghanistan reaching 8.5 million children, including 2.4 million children who were previously inaccessible.
At the same time, polio programme health workers at the forefront continued to support global COVID-19 response efforts by delivering vaccines, mobilizing communities, and countering misinformation among other activities. The use of GPEI infrastructure for health emergency response has provided critical lessons for integrating polio resources into broader health systems as more countries work towards transition and the post-certification period.
Following dire predictions issued at the end of 2020, the polio programme once again proved its ability to adapt to programmatic, epidemiological and political developments. Entering 2022, there is much cause for cautious optimism – wild poliovirus transmission has slowed drastically, and cases of cVDPV2 have also declined compared to last year.
Importantly, commitment to achieving a lasting polio-free world is evident at all levels: by core GPEI partners, including among the Polio Oversight Board, which travelled to Pakistan twice in 2021; by health workers, communities and parents; and by country leaders worldwide who helped champion this year’s milestones. With the new strategy, new tools and adapted approaches, the stage is set to achieve lasting success.
To stop all forms of polio for good, the GPEI aims to capitalize on the positive epidemiological situation leading into 2022. A key opportunity to kick-start the year will be the WHO Executive Board meeting in January, where Member States plan to discuss building on the successes of this past year by fully implementing and financing the programme’s new strategy. Rotary and other key global GPEI partners are planning a renewed and intensified outreach across the broader international development community to secure the necessary financial resources to achieve success. Polio immunization campaigns will also continue in full force in both endemic and outbreak countries.
Twelve months ago, the programme was in a much different place, as WHO and UNICEF launched an Emergency Call to Action to draw attention to the need for renewed commitment. A year later, thanks to a strengthened and unified response, the GPEI is meeting the moment and is more committed than ever to end all forms of poliovirus, once and for all.
Poliomyelitis (polio) returned to Tajikistan in the past year, with the first case of an outbreak of circulating vaccine-derived poliovirus type 2 (cVDPV2) detected in a child who developed acute flaccid paralysis (AFP) on 22 November 2020 in the province of Khatlon.
In response to the outbreak, 3 rounds of supplementation immunization with novel oral polio vaccine type 2 (nOPV2) were conducted, all of which reached a reported 99% of the target group of children under the age of 6.
Both environmental surveillance and active AFP case searches in hospitals and health facilities are continuing throughout the country to ensure that any potential further circulation will be detected.
The latest AFP case with confirmed cVDPV2 had onset of paralysis on 26 June 2021. The latest positive environmental sample was collected on 27 August, before completion of the third round of immunization in early September.
“Tajikistan has responded with full commitment and with the dedicated support of Global Polio Eradication Initiative partners to stop this outbreak,” said Dr Victor Olsavszky, WHO Representative and Head of the WHO Country Office in Tajikistan.
“We are cautiously optimistic that the extensive surveillance and immunization campaigns of the past 11 months have closed the door on further spread of this virus. This is vital for the health of children in Tajikistan and beyond.”
Extent of the outbreak in Tajikistan
As of 1 October 2021, 31 children have been found to have polio (paralysis) caused by cVDPV2, and the virus has also been isolated from 26 children without paralysis. Twenty environmental samples have tested positive for presence of the virus. All detected polioviruses are linked to a virus strain currently circulating in Pakistan.
The geographic spread of cVDPV2 (based on detection among children and in the environment) has been limited to Dushanbe city and 14 districts in the centre and south of the country.
The oral polio vaccine (OPV) that has brought the wild poliovirus to the brink of eradication has many benefits: the live attenuated (weakened) vaccine virus provides better immunity in the gut, which is where polio replicates.
However, in communities with low immunization coverage, as the virus is spread from one unvaccinated child to another over a long period of time (often 12–18 months), it can mutate into a form that can cause paralysis, just like the wild poliovirus. This mutated poliovirus can then spread in communities, leading to cVDPV2 outbreaks.
The number of cVDPV2 outbreaks globally has increased sharply since early 2019. In 2020, cVDPV2 cases emerged in Afghanistan and were reported in areas close to Tajikistan, Turkmenistan and Uzbekistan.
nOPV2 is a new tool that Global Polio Eradication Initiative partners are deploying to better address cVDPV2. nOPV2 is safe and provides comparable protection against poliovirus, while being more genetically stable and therefore less likely to revert into a form that can cause paralysis in under-immunized communities. This means that nOPV2 could help stop cVDPV2 outbreaks.
WHO recommends that all countries, in particular those in which there is frequent travel to and contact with polio-affected countries and areas, strengthen surveillance for AFP and maintain high routine immunization coverage. All travellers to polio-affected areas should be fully vaccinated against polio.
Watch this animation to learn how the Global Polio Eradication Initiative (GPEI) intends to reinvigorate polio prevention and outbreak response with the bold new GPEI Strategy for 2022-2026.
In Ukraine, one case of polio, caused by circulating vaccine-derived poliovirus type 2 (cVDPV2), has been confirmed. A cVDPV2 was isolated from a 17-month old girl with acute flaccid paralysis, from Rivne province (in the north-west of the country), and from six healthy contacts (siblings of the girl).
The current isolate is closely linked to the virus originating in Pakistan which has also been a cause of ongoing cVDPV2 outbreak in Tajikistan. Local authorities, along with WHO regional and country teams, are conducting further investigations to determine the source of the isolated virus, whether there has been transmission within Ukraine, and to ascertain any potential risk of further spread. The Government of Ukraine officially notified WHO of the isolated virus on 3 October 2021 and publicly announced the case detection on 6 October 2021.
Supplemental vaccination of all young children in the affected area is planned to ensure catch up for any children who may have missed routine polio vaccination and ensure that all are protected from the disease. This will take place from 11 to 22 October with inactivated polio vaccine (IPV) for children aged less than five years of age, regardless of previous vaccination history, in the immediate area of where the case was detected. Additional vaccination activities will aim to cover the entire population of under-five year olds in this region over the coming 90 days.
In 2015, Ukraine was affected by a circulating VDPV type 1, resulting in two cases at the time. This outbreak was successfully stopped in 2016. An ambiguous VDPV type 2 was reported in Odesa province of Ukraine in 2016. The latest detection in Rivne is unrelated to the 2015 outbreak and 2016 isolation.
cVDPVs can occur if the weakened strain of the poliovirus originally contained in OPV passes among under-immunized populations for a prolonged period of time. If not enough children are immunized against polio, the weakened virus can pass between individuals and over time genetically revert to a form that can cause paralysis.
National coverage in Ukraine with the first dose of inactivated poliovirus vaccine—which protects against all three types of polioviruses—was 87% in 2020, according to WHO/UNICEF estimates. However, subnational coverage varies and is reportedly below 50% in some regions of the country.
VDPV outbreaks are stopped using the same tactics that have enabled progress against wild polio – ensuring every child is reached with polio vaccines through high-quality immunization campaigns and routine immunization.
Following careful review of safety and genetic stability data from mass immunization campaigns conducted with the novel oral polio vaccine type 2 (nOPV2), the Strategic Advisory Group of Experts on immunization (SAGE) today endorsed the transition to the next use phase for the vaccine. WHO’s independent Global Advisory Committee on Vaccine Safety (GACVS) and SAGE confirmed that there were no major safety concerns associated with nOPV2 after reviewing data from campaigns that used more than 65 million doses in Nigeria, Liberia, Congo and Benin earlier this year. Rollout of nOPV2 began in March and to date approximately 100 million doses have been administered to children across seven countries.
“The move is a positive and welcome advancement as GPEI and countries strive to bring cVDPV2 outbreaks to an end, and sees the achievement of a milestone outlined in goal 2 of our strategic plan: the goal to stop cVDPV2,” commented Aidan O’Leary, WHO’s director of polio eradication. “Not only does the decision inspire further confidence in nOPV2 as a safe and effective tool, it will facilitate a smoother preparedness process for countries looking to use the vaccine in the future,” he added.
“We are very pleased with the SAGE’s endorsement of transitioning nOPV2 to the next rollout phase. Progress like this is a result of strong partnerships at every level and we must continue forging forward together, using innovative tools like nOPV2, to reach every last child and end all forms of polio for good,” said Akhil Iyer, the UNICEF Director of Polio Eradication.
Ananda Bandyopadhyay, deputy director from the Bill & Melinda Gates Foundation and co-lead of GPEI’s nOPV2 Working Group stated, “Today is an important milestone in the road to polio eradication. Innovation has always been key to progress, and this tool – the first vaccine ever to be approved under WHO’s EUL pathway – is a shining example of how the GPEI responds to challenges, but the work is far from over.” BMGF is a core partner in GPEI and has funded the development of nOPV2 from its inception.
Requirements for rollout
Prior to this transition, countries were required to meet an additional set of strict criteria to use nOPV2 during its initial use period. These were developed by GPEI and endorsed by SAGE to allow for even closer monitoring of nOPV2’s performance during its introductory phase and early large-scale uses. While countries no longer need to meet these initial use protocols, use of nOPV2 remains subject to specific post-deployment requirements under EUL, such as monitoring for safety and effectiveness.
“As we move forward into the next phase of the vaccine’s rollout, countries will still need to meet special use requirements, but they will be less onerous,” said Simona Zipursky, WHO co-lead of the GPEI’s nOPV2 Working Group. “GPEI will continue to work with all countries who wish to roll out nOPV2 to help them meet these remaining criteria,” she added.
Optimal response with available vaccine
In addition to those who have already rolled out the new tool, 16 other countries are also verified as ready to use nOPV2 by GPEI and a further 17 are in the midst of preparations. More nOPV2 campaigns are due to launch later this year, however, supply of the vaccine is limited.
Active cVDPV2 outbreaks are ongoing in more than 20 countries across Africa and Asia and there have been recent detections of the virus in Europe. COVID-19 has impacted production of the vaccine, including by limiting supplies, available personnel and manufacturer capacity. GPEI is working with nOPV2’s manufacturer, Bio Farma, to increase supply as soon as possible and is accelerating efforts to bring a second manufacturer online. A GPEI prioritization framework will guide distribution of nOPV2 for the immediate term, until supply is increased.
“We are seeing sharp rises in demand for nOPV2, which is testament to the vaccine’s field performance, and we are working to increase supply as quickly as feasible,” said O’Leary. “We must be very clear though, that outside of nOPV2, there is no shortage of effective type-2 containing oral polio vaccines, and countries should not delay in responding to an outbreak. In line with SAGE’s guidance they should respond rapidly with whichever of the vaccines (mOPV2/nOPV2) is available to them,” he said.
With nOPV2 not yet WHO-prequalified, monovalent oral polio vaccine type 2 (mOPV2) ̶ nOPV2’s counterpart and close relative ̶ remains available to countries for outbreak response. The vaccine has a track record of successfully stopping cVDPV2 transmission and from 2019 to 2020, nearly 80% of outbreaks were closed following just two rounds of immunization. Trivalent oral polio vaccine (tOPV), containing all three vaccine serotypes, may be a more appropriate tool in situations where there is co-circulation of wild polio virus type 1 (WPV1) and cVDPV2.
“All OPVs can stop outbreaks,” said O’Leary. “Regardless of which vaccine is used, the key for any successful [outbreak] response is achieving high levels of vaccination coverage and quickly. That is what we need to remain mindful of and achieve. nOPV2 is only one of the effective vaccines in our toolkit and GPEI will continue to support countries to respond as rapidly as possible to outbreaks, as per the SAGE guidance.”
Next steps for nOPV2 development
Polio remains a Public Health Emergency of International Concern (PHEIC) under International Health Regulations, enabling nOPV2’s continued use through EUL. Field data collection and analyses will be ongoing to support the vaccine’s prequalification and full licensing, expected in 2023. Among other studies, a phase III clinical trial is currently underway in the Gambia.
The Global Polio Eradication Initiative (GPEI) is greatly concerned by the United Kingdom’s proposed cuts to contributions toward polio eradication in 2021. The proposed 95% reduction will result in an enormous setback to the eradication effort at a critical moment.
The UK has a long legacy as a leader in global health and its leadership in polio eradication, including financial contributions to the GPEI, have driven wild poliovirus out of all but two countries in the world. The GPEI values the UK government’s steadfast partnership and shared commitment to eradicating polio, and UK citizens have generously championed the drive to end polio. This has helped bring the world to the cusp of being polio-free, whilst providing an investment in broader public health capacity.
In 2019, the UK government pledged to help vaccinate more than 400 million children a year against polio and to support 20 million health workers and volunteers in this vital work. In addition to their life-saving work to end polio, these health workers have been in the frontline of the fight against COVID-19 and have helped some of the world’s most vulnerable countries protect their citizens. The UK’s ongoing support is needed to ensure that the polio infrastructure can continue supporting COVID-19 response efforts, while also resuming lifesaving immunization services against other deadly childhood diseases. In 2020, the UK government’s contributions ensured that the GPEI could continue to support outbreak response in 25 countries and conduct surveillance in nearly 50, all whilst strengthening health systems. The continuation of such support will not be possible unless replacement funds are identified, and as such, this funding cut will have a potentially devastating impact on the polio eradication program.
The GPEI recognises the challenging economic circumstances faced by the UK government and a host of other countries. Governments worldwide are making critical investments in the health of their citizens, as well as evaluating global commitments. Cutting the UK government’s contributions by 95% will, however, put millions of children at increased risk of diseases such as polio and will weaken the ability of countries to detect and respond to outbreaks of polio and other infectious diseases, including COVID-19. Furthermore, it risks delaying polio eradication and the dismantling of one of the most effective disease surveillance and response networks at a time when the COVID-19 pandemic continues its devastation.
GPEI looks forward to working with the UK and the broader global community to address these urgent issues, which jeopardize the collective investment and progress toward a polio free world. Together we can end polio forever and ensure that polio infrastructure and its assets continue to strengthen preparedness and response and save lives.
Dr Hamid Jafari, Director of Polio Eradication for WHO’s Eastern Mediterranean Region, declared Somalia’s outbreak of circulating vaccine-derived poliovirus type 3 (cVDPV3) closed a full 28 months after this strain of polio was last detected in Somalia.
Seven children were paralysed by the type 3 strain in the 2018 outbreak, and sewage samples regularly monitored for poliovirus tested positive for cVDPV3 a dozen times, beginning March 2018. There is no doubt that the virus circulated widely around southern and central Somalia. Despite extensive disease surveillance measures, no cVDPV3 has been identified since 7 September 2018, when the last child developed paralysis.
Closing a polio outbreak is a formal process steered by a detailed checklist of surveillance indicators that must be met in order to show that the virus is not just hiding in a far-flung pocket but has truly disappeared. Sewage runoff is tested for virus, and health workers and community members actively search for paralysis in children, and then investigate any paralysis they do find to rule out polio. Accessing hard-to-reach communities is a challenge in Somalia, but a vital aspect of this work.
The 2018 cVDPV3 outbreak was part of a 2-strain polio outbreak in Somalia at that time, along with circulating vaccine-derived poliovirus type 2. Both strains emerge and paralyse children in under-immunized populations – places where not enough children have consistently had access to polio vaccines. The cVDPV2 outbreak continues to paralyse children, and environmental samples – sewage water – consistently show that virus moving through Somali communities. For the polio programme, the presence of cVDPV2 samples and the absence of cVDPV3 samples is bittersweet: it demonstrates the sensitivity of our testing, so we can be confident cVDPV3 is no longer a threat to Somali children – but it makes clear that the threat of paralytic polio still looms.
Across the Region, cVDPV2 cases are on the rise – as across much of WHO’s African Region. Wild poliovirus still stalks children across Afghanistan and Pakistan, and the movement of people across borders underscores the risk of importation across and beyond the Region.
The end of Somalia’s cVDPV3 outbreak shows what can be achieved with high-quality vaccination campaigns, on-the-ground leadership and sensitive surveillance measures.
The new Regional Subcommittee brings together ministers of health from Member States across the Eastern Mediterranean Region to tackle some of the persistent high-level challenges to polio eradication. Those include raising the visibility of polio eradication as a regional public health emergency and priority and mustering the political support and domestic financial support needed to finish the job.
During the inaugural meeting convened by the Regional Director, Dr Ahmed Al-Mandhari, two co-chairs were elected to drive the regional push: Egypt’s Minister of Health and Population, H.E Dr Hala Zayed, and the Minister of Health and Prevention of the United Arab Emirates, H.E. Abdul Rahman Mohammed Al Oweis.
H.E. Abdul Rahman Mohammed Al Oweis was represented at the meeting by Dr Hussain Al Rand, the Assistant Undersecretary for Health Centres and Clinics and Public Health, United Arab Emirates. Both Member States flagged the urgency of the state of polio transmission in the last polio-endemic region at present, but also the opportunity to leverage greater regional coordination to achieve eradication.
Polio eradicators around the world know that ours is, in many ways, a grassroots programme: we use microplans to work through neighbourhoods door to door, household to household. But big-picture solidarity is needed to maximize the success of our ground-level efforts.
Wild poliovirus transmission has spread beyond core reservoirs of polio endemic Afghanistan and Pakistan, infecting 140 children in 2020. Outbreaks of circulating vaccine-derived poliovirus type 1 (cVDPV1) paralysed 29 children in Yemen. Type 2 outbreaks spread across the Region in 2020, paralysing 308 children in Afghanistan, 135 in Pakistan, 58 in Sudan and 14 in Somalia. At a time like this, moving forward as a region and as blocs, rather than on a country-by-country basis, is critical.
One of the issues identified by Member States as critical to stopping transmission is the movement of people across borders, and ensuring that surveillance and vaccination efforts target the increasing number of people who regularly cross borders across the region – whether they are moving as a consequence of conflict, environmental crises or economic necessity.
Interventions were made by Afghanistan, Egypt, the Islamic Republic of Iran, Iraq, Oman, Pakistan, Saudi Arabia and the United Arab Emirates. All statements reaffirmed strong support for the establishment of the subcommittee under the Regional Committee Resolution on polio eradication adopted in 2020.
Members of the subcommittee were unanimous in their commitment to engage in coordinated action and support of regional polio eradication efforts in four strategic areas. These include raising the visibility of the polio emergency in the Region, pushing for collective public health action, strengthening efforts to transition polio assets and infrastructure and advocating for the mobilization of national and international funding to achieve and sustain polio eradication.
A theme that ran through all Member States’ interventions was the idea of maximizing the resources already in place – including the workers, the polio and EPI infrastructure a across the region, and the array of community leadership groups with which the polio programme has worked in past.
“Last year or the year before the year before there was a meeting in Muscat with religious leaders from different countries, and I think we need to capitalize on their support. We need to give them ownership,” said Dr Ahmed Al Saidi, Minister of Health, Oman.
The COVID-19 pandemic has had an outsized impact on polio programmes across the region. The four-month pause in vaccination, from March-July 2020, gave the virus a window to spread almost unchecked. While we are immensely proud to have shouldered much of the COVID response burden, with GPEI infrastructure still supporting that response, this has come at a cost: nearly 80 million vaccination opportunities were lost.
“But we are moving forward, making up lost ground and, through this new Regional Subcommittee, leveraging the credibility that the polio programme has built through its pivot to COVID-19 and back again to polio,” said Dr Hamid Jafari, Director of the regional polio programme and co-facilitator of the Regional Subcommittee.
That credibility is now the polio’s most valuable asset: the proof that polio programmes are not just a means to battle polio, but sophisticated, fast-moving public health assets skilled in pandemic response.
The subcommittee will report its progress to WHO’s governing bodies meetings, including the World Health Assembly and the Regional Committee for the Eastern Mediterranean.
The Secretariat, which is made up of the office of the Regional Director and members of the regional polio eradication programme from WHO’s Eastern Mediterranean Region, will support the subcommittee to develop a programme of work based on the key outputs of the group.
From her first polio vaccination campaign in 1997 to the present day, Dr. De Sousa has never lost her passion for increasing access to immunization. The National Expanded Program on Immunization (EPI) Manager for Angola, she remembers her first impressions of the country, “At the time, I could see that most children in the country were not vaccinated and I was excited to help them.”
From the outset, she knew that taking on polio eradication would be challenging. “Angola had just emerged from an armed conflict and there were areas that were very difficult to access, due to dilapidated roads, broken bridges and mining activity, and for that reason there was low routine vaccination coverage. Nevertheless, I felt that I had a duty to fulfill for our children, so I accepted the challenge.”
In 1998, Dr. De Sousa was appointed by the National Directorate of Public Health to help implement the Epidemiological Surveillance System for Acute Flaccid Paralysis (AFP) – one of the primary symptoms of polio. It was a position that required grit and resilience.
She explains, “This was a big responsibility because highly sensitive surveillance for AFP, including immediate case investigation and specimen collection, are critical for the detection of wild poliovirus. AFP surveillance is also critical for documenting the absence of poliovirus circulation for polio-free certification.”
“One of my most vivid memories of the programme is from 1999 when I was trying to reach conflict-affected areas after a polio epidemic had registered more than 1190 cases and 113 deaths. I was early in my career with only two years of service and the sheer number of cases and deaths led me to be proactive and persistent in my day-to-day activities toward the eradication of the disease.”
“Another standout moment occurred on the second time that I went to coordinate a vaccination campaign in the province of Moxico; one of the vehicles in our convoy triggered a mine, so we were forced to stop the vaccination campaign as our colleagues were stranded in conflict zones for a few days. This incident captures the difficult circumstances we were operating in as health workers.”
Eradicating wild virus in Angola
For years the polio team worked to improve operations to detect polio and deliver vaccines, but the virus fought back. After registering a last case of indigenous wild poliovirus in September 2001, Angola recorded four successive outbreaks imported from India and Congo. Dr. De Sousa remembers that this caused many people to doubt that the eradication of polio would ever be possible.
“But I refused to be discouraged. I’ve never backed down from a challenge and I don’t plan to soon.”
After years of work, Angola finally received wild polio-free status in November 2015. Dr. De Sousa describes it as her proudest moment.
“I felt that I made a great contribution to my country and our children as the person managing the Extended Program on Immunization in Angola.”
A new challenge
In 2019, Angola’s immunization team faced a new challenge when the polio programme detected an outbreak of circulating vaccine-derived polio type 2, a type of polio that emerges in places with low immunity. Dr. De Sousa again found herself at the forefront of the action, starting by supporting the Government to respond with vaccination campaigns.
One of her key tasks since has been recruiting new immunization health professionals, who can help reach the children missed by routine immunization and polio campaigns. She explains, “my goal is to train my colleagues so that we can work together to reach the vast number of Angolan children missing out on lifesaving vaccines.”
In July 2020, Angola held its first polio campaign after a pause on vaccination activities in the early months of the COVID-19 pandemic. More than 1.2 million children were reached by over 4000 vaccinators.
Gender and leadership
Dr. De Sousa explains that being a woman leader in Angola isn’t easy. “It requires a lot of time, dedication and a balance with domestic, family, and social life, which has not been easy to manage. However, with the help of God and my family – especially my husband – I am managing to carry out my work.”
“It has all been worth it for the results I’ve helped to achieve, and even though we have some way to go in relation to vaccination coverage, I’m grateful for the opportunity to ensure the health of our children and serve my country.”
In Angola, at the provincial and municipal level, there are very few women compared to men. However, in public health programmes at the national level, women outnumber men. Dr. De Sousa says that, “In general, I think there should be more women leading and administering vaccination programmes”.
In 2021, the polio programme is aiming to implement more outbreak response vaccination rounds to reach children with low immunity to the poliovirus. Driven by her passion and sense of duty, Dr. De Sousa will continue to be on the frontlines of this effort.
N’Djamena – One of the largest polio immunization campaigns in the African Region this year has just concluded in Chad, where over 3.3 million children in 91 districts were vaccinated. This pushes the total number of children vaccinated against polio to over forty million across 16 countries in the Region, since campaigns resumed following a necessary pause in immunizations due to the COVID-19 pandemic.
While Africa was declared free of the wild poliovirus in August 2020, another form of polio continues to affect children: circulating vaccine-derived poliovirus, or cVDPV. This type of polio is rare and can only occur in areas where not enough children are immunized. The only way to stop spread of cVDPV is through immunization.
The current type 2 cVDPV outbreak in Chad was detected in February 2020—yet immunizations were halted due to COVID-19 and the virus spread to 36 districts across the country, paralyzing more than 80 children and even leading to cases in neighbouring Sudan and the Central African Republic.
“Viruses do not respect national borders,” said Dr Ndoutabé Modjirom, head of the polio Rapid Response Team at the World Health Organization (WHO) African Region. “Given Chad’s central geographic location and its mobile populations, it was important to carry out a large-scale campaign that targeted key populations and high-risk areas throughout the country.”
The vaccination campaign was carried out in two phases, the first taking place between 13-15 November and the second from 27-29 November.
While mass polio vaccination campaigns were stopped across Africa due to COVID-19 restrictions, they resumed in July 2020. The response in the region overall, and in Chad in particular, demonstrates the commitment by Global Polio Eradication Initiative partners and countries across Africa to stop polio, even amidst the difficult operating context of COVID-19.
“The number of children reached since polio campaigns have resumed is extremely encouraging,” said Dr Matshidiso Moeti, WHO Regional Director for Africa. “This large-scale campaign in Chad during COVID-19 is a reflection of the Region’s commitment and ability to face multiple difficult health challenges and protect the health of all children.”
Although campaigns were on hold for several months, work did not stop. Chad’s team of national and international polio experts together with the AFRO Rapid Response Team tracked the virus, conducted a comprehensive risk assessment, and planned an outbreak response to take place as soon as it was safe to do so, taking into account timelines in outbreak response standards of practice. Consultations were also held with the national COVID-19 task force to ensure that best practices in infection prevention and control would be followed. The commitment and efforts of the Ministry of Health and other key national and regional health leaders and partners, including UNICEF, were instrumental in conducting the campaign.
“With increased immunizations and the continued commitment of health leaders and partners, we are confident that we will soon see the end of this outbreak and the end of all forms of polio in Africa,” said Dr Jean Bosco Ndihokubwayo, WHO representative for Chad.
About polio eradication
The Global Polio Eradication Initiative is spearheaded by WHO, Rotary International, the US Centers for Disease Control and Prevention (CDC), UNICEF, the Bill & Melinda Gates Foundation and Gavi, the Vaccine Alliance.
On 6 November, WHO and UNICEF jointly issued an urgent call to action to avert major measles and polio epidemics as COVID-19 continues to disrupt immunization services worldwide, leaving millions of vulnerable children at heightened risk of preventable childhood diseases. Learn more about the call to action.