This Week

Polio this week as of 30 November

  • In Indonesia, following confirmation last week of VDPV2 isolated from an AFP case (7-year old child) with onset of paralysis on 9 October, from Aceh province, circulating of this strain has been confirmed following isolation of the virus from three healthy community contacts.  See ‘Indonesia’ section below, for more.
  • At a WHO Member State Information Session on 16th November, regional and programme representatives set out the actions being taken in 2023 to step up polio transition efforts towards strengthening health systems, bolstering immunization and disease surveillance, and protecting against polio outbreaks. Particular focus is on the development of a global vision for polio transition, supported by tailored regional action plans and a strengthened monitoring and evaluation framework, building on successes and lessons learned so far.
  • nOPV2 rollout: Approximately 525 million doses of nOPV2 have been administered across 25 countries under its WHO Emergency Use Listing (EUL). An additional 15 countries have met the requirements for nOPV2 use in the event of an outbreak. For more information on nOPV2, visit: www.polioeradication.org/nOPV2.

Summary of new polioviruses this week:

  • Afghanistan: two WPV1 positive environmental samples
  • DR Congo: one cVDPV1 case
  • Indonesia:  one cVDPV2 case
  • Nigeria: five cVDPV2 positive environmental samples
  • Yemen: four cVDPV2 cases

Weekly country updates as of 30 November 2022

  • Two WPV1-positive environmental samples were reported in Nangarhar province.
  • The total number of WPV-1positive environmental samples in 2022 is thirteen, all from Eastern Region.
  • No wild poliovirus type 1 (WPV1) cases were reported this week. There are 20 cases in 2022. There was one WPV1 case in 2021.
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There is one case in 2022 that is linked to the Zamfara emergence from Nigeria.
  • Four cVDPV2 positive environmental samples were reported this week and collected in Tamanghasset.
  • The total number of cVDPV2 positive environmental samples in 2022 is 14.
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There are seven cases reported in 2022. There were three cases reported in 2021.
  • No circulating vaccine-derived poliovirus type 2 (cVDPV2) positive environmental sample was reported this week. There is one positive sample reported in 2022.
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There were two cases reported in 2021.  
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There were three cases reported in 2021.
  • No cases of circulating vaccine-derived poliovirus type 2 (cVDPV2) were reported this week; There are three cases reported in 2022. There were no cases reported in 2021.
  • Four cases of circulating vaccine-derived poliovirus type 2 (cVDPV2) were reported: one each from Mayo Kebbi Est, Logone Oriental, Wadi Fira and Tandjile.
  • The total number of cVDPV2 cases in 2022 is 22.
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There were two cases reported in 2021.
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There were no cases reported in 2021.
  • No circulating vaccine-derived poliovirus type 2 (cVDPV2) positive environmental samples were reported this week.
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. The total number of cVDPV2 cases in 2022 is 191.
  • One cVDPV1 was reported in Haut Lomami bringing the number of cVDPV1 cases in 2022 to 48.
  • Outbreak response to both cVDPV1 and cVDPV2 is being intensified.
  • No circulating vaccine-derived poliovirus type 2 (cVDPV2) positive environmental sample was reported this week. There are 18 positive samples reported in the country in the last two years.
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There is one case in 2022 and one case reported in 2021.
  • Two cases of circulating vaccine-derived poliovirus type 2 (cVDPV2) were reported this week from SNNP and Ahmara. The dates of onset of paralysis are: December 2020 for the case in SNNP and April 2022 for the one in Ahmara. Both viruses are genetically linked and are part of a new emergence in the country. There is now one case reported in 2022.
  • No circulating vaccine-derived poliovirus type 2 (cVDPV2) positive environmental samples were reported this week. There were nine positive samples in 2021.

 

  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There are two cases reported in 2022.
  • No cVDPV2 positive environmental samples were reported this week.
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There were six cases in 2021.
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There are three cases in the country which are linked to the Jigawa outbreak in Nigeria in 2021.
  • No case of circulating vaccine-derived poliovirus type 3 (cVDPV3) was reported this week. There is one case reported in 2022.
  • The country has been confirmed as affected by both cVDPV2 and cVDPV3.
  • One case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week, with onset of paralysis on 9 October, from Aceh province.  It is the first case reported from the country.  Genetically-linked virus was also isolated from three healthy community contacts.
  • A risk assessment and field investigation is currently ongoing by local and national public health authorities, and supported by partners of the Global Polio Eradication Initiative, including to assess more clearly the origin of the isolated viruses.  The Ministry of Health has publicly announced the outbreak, and catch-up immunization campaigns were launched in the immediately-affected area on 28 November, targeting 1.2 million children under the age of 13 years.
  • Based on a detailed risk assessment, two large-scale vaccination campaigns are planned, one each in January and February 2023, covering four provinces (Aceh, North Sumatera, Riau and West Sumatera), targeting 3.7 million children.
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There were three cVDPV2 cases in 2021.
  • No case of circulating vaccine-derived poliovirus type 1 (cVDPV1) was reported this week. The number of cases in 2022 is 10. There were 13 cases in 2021.
  • No case of wild poliovirus type 1 (WPV1) was reported this week. One case from 2021 has been reported this year.
  • No case of circulating vaccine-derived poliovirus type 1 (cVDPV1) was reported this week. There are three cases in the country.
  • Malawi continues to participate in the multi-country, subregional outbreak response, to urgently stop the WPV1 outbreak affecting the area.
  • No circulating vaccine-derived poliovirus type 2 (cVDPV2) positive environmental sample was reported this week. There were seven positive samples linked to the Jigawa outbreak in 2021.
  • No wild poliovirus type 1 (WPV1) case was reported this week. There are eight cases reported in 2022. Reporting of these new cases within a short time span indicates that intensified surveillance efforts are working in the province.
  • No cases of circulating vaccine-derived poliovirus type 1 (cVDPV1) were reported this week. There are 16 cases in 2022.
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. The number of cases in 2022 remains four. There were two cases reported in 2021.
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There are 11 cases reported in 2022. There were 18 cases reported in 2021.
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There are 42 cVDPV2 cases reported in 2022.
  • Five cVDPV2-positive environmental samples have been reported; three in Sokoto and two in Zamfara.
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There were 17 cases reported in 2021.
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There were five cases reported in 2021.
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There are four cases reported in 2022. There was one case reported in 2021.
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There were nine cVDPV2 cases reported in 2021.
  • No circulating vaccine-derived poliovirus type 2 (cVDPV2) positive environmental sample was reported this week. There has been one case and two positive samples reported in 2022.
  • No circulating vaccine-derived poliovirus type 2 (cVDPV2) positive environmental sample was reported this week. There were two positive samples linked to the N’Djamena outbreak in Chad reported in 2021.
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There were two cases reported in 2021.
  • Disease surveillance continues to be strengthened, to the degree possible given the evolving situation, including by building capacity, conduct trainings, implement environmental surveillance and support routine immunization.
  • No circulating vaccine-derived poliovirus type 2 (cVDPV2) positive environmental samples were reported this week. Two positive samples were reported in May and one in August following the isolation of vaccine-derived poliovirus type 2 (VDPV2) from environmental samples in London, UK.
  • No cases of paralysis associated with this strain have been detected – virus has been isolated only from environmental (sewage) samples, however.
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. One cVDPV2 case was reported in New York, with onset of paralysis on 20 June.
  • Four cases of circulating vaccine-derived poliovirus type 2 (cVDPV2) were reported; one each in Ibb and Dhamar and two in Hajjah. There are 158 cases reported in 2022.
  • No circulating vaccine-derived poliovirus type 2 (cVDPV2) positive environmental sample was reported this week. There is one positive sample reported in 2022.

For more country information, please visit the respective pages within the Outbreak and Endemic country sections of the GPEI website.