This Week

Polio this week as of 12 June 2018

  • Featured on www.polioeradication.org: No mountain too high: Ending polio in Laos.
  • Following unconfirmed reports on 8 June of suspected polio re-emergence in Venezuela, final laboratory testing has confirmed the cause of the paralysis is not wild poliovirus or vaccine-derived poliovirus. The full statement from the Global Polio Eradication Initiative may be read here.
  • World leaders at the G7 summit affirmed continued commitment to global polio eradication in the summit communique: “We reconfirm our resolve to work with partners to eradicate polio and effectively manage the post-polio transition”.
  • Summary of newly-reported viruses this week: One new wild poliovirus type 1 (WPV1) case reported from Pakistan. See country sections below for more details.

NA: Onset of paralysis in most recent case is prior to 2017. Figures exclude non-AFP sources. All cVDPV are type2.  cVDPV definition: see document “Reporting and classification of vaccine-derived polioviruses” at [pdf]

Weekly country updates as of 12 June 2018

  • No new cases of wild poliovirus type 1 (WPV1) have been reported this week.  The total number of WPV1 cases in 2018 remains eight.
  • The most recent case (by date of onset) occurred in Kandahar province, with onset of paralysis on 27 April 2018.
  • During the May immunization campaign, vaccinators worked to reach over 9.6 million children with bivalent oral polio vaccine.
  • Read the latest polio update from Afghanistan to see information on cases, surveillance and vaccination campaigns.
  • One new case of wild poliovirus type 1 (WPV1) was reported this week, bringing the total number of officially reported WPV1 cases in Pakistan in 2018 to three. This latest case had onset of paralysis on 18 May, from Dukki, Balochistan.
  • During the May immunization campaign, vaccinators worked to reach over 20 million children with bivalent oral polio vaccine.
  • Read the latest polio update from Pakistan to see information on cases, surveillance and vaccination campaigns.
  • No new cases of wild poliovirus type 1 (WPV1) were reported in the past week.
  • The total number of WPV1 cases for 2016 is four and no cases have been reported in 2017 or 2018. The most recent WPV1 case (by date of onset) was reported in Monguno Local Government Area, Borno State, with onset on 21 August 2016.
  • Circulating vaccine-derived poliovirus type 2 (cVDPV2) is confirmed in Jigawa state. cVDPV2 has been isolated from environmental samples and one AFP case with onset of paralysis on 15 April.
  • Since confirmation of cVDPV2 in Nigeria, the country has conducted additional acute flaccid paralysis surveillance strengthening activities including enhanced active surveillance visits, and community sampling. The programme has also carried out extensive search for type 2 containing vaccines (tOPV/mOPV2) in the areas surrounding where the virus was detected.
  • The GPEI is working with Regional and country counterparts and partners to supporting the local public health authorities to conduct outbreak response. This includes the implementation of two rounds of mOPV2 vaccination in May and June covering part of Jigawa, Gombe, Bauchi and Sokoto.
  • The detection of wild poliovirus type 1 (WPV1) and circulating vaccine-derived poliovirus type 2 (cVDPV2) in Nigeria continue to pose a risk to the neighbouring countries of the Lake Chad basin.
  • Emergency outbreak response efforts continue across the Lake Chad basin, together with activities to fill subnational surveillance gaps across the region.
  • These activities include efforts to vaccinate children at markets, in internally displaced persons camps, and at international borders.
  • In May, two polio vaccination campaigns with bOPV took place, targeting vulnerable island populations in Lake Chad. These special vaccination activities concerned eight health districts in Chad: Bagasola, Bol, Isseirom, Karal, Kouloudia, Liwa, Mani and Ngouri.
  • No new cases of circulating vaccine-derived poliovirus type 2 (cVDPV2) were reported in the past week in the Democratic Republic of the Congo (DRC).
  • The total number of officially reported cVDPV2 cases in the DRC in 2018 remains four.
  • The most recent case (by date of onset) was reported in Kikula district, Haut Katanga province, with onset on 19 February.
  • The Ministry of Health, supported by WHO and partners of the Global Polio Eradication Initiative, remains fully committed to outbreak response in the affected provinces, including use of monovalent oral polio vaccine type 2 (mOPV2) across the country, in line with internationally-agreed outbreak response protocols.
  • Surveillance and immunization activities are being strengthened in neighbouring countries.
  • Read our Democratic Republic of the Congo country page to see information on surveillance and vaccination campaigns.
  • Learn more about vaccine-derived polioviruses through this short animation or this ‘Coffee with Polio Experts’ video.
  • Since the beginning of this outbreak response, there has been no isolation of either cVDPV3 or cVDPV2 from acute flaccid paralysis cases or their contacts in either Somalia or Kenya.  Virus has been isolated from environmental samples only.
  • Outbreak response to both strains is currently being implemented, in line with internationally-agreed guidelines. Large-scale supplementary immunization activities (SIAs) have been implemented in Banadir, Lower Shabelle and Middle Shabelle regions, Somalia, with additional SIAs planned in the affected zones of the Horn of Africa.  Special surveillance activities are being undertaken to determine the origin of the viral circulation.
  • WHO and partners continue to support local public health authorities across the Horn of Africa in conducting field investigations and risk assessments.
  • Read our Somalia country page and Kenya country page to see information on surveillance and vaccination campaigns.
  • Learn more about vaccine-derived polioviruses through this short animation or this ‘Coffee with Polio Experts’ video.
  • No new cases of circulating vaccine derived poliovirus type 2 (cVDPV2) were reported in the past week in Syria.
  • The total number of officially reported cVDPV2 cases in Syria in 2017 remains 74. There are no cases reported in 2018.
  • The most recent case (by date of onset) was reported in Boukamal district, with onset on 21 September 2017.
  • IPV vaccination continued in Raqqa governorate in April as part of the outbreak response. A total of 9,257 children aged 2-23 months who were not covered during the February round were vaccinated in Tell Abyad district.
  • In addition, Raqqa city was accessed for the first time with IPV. A total of 7,215 children aged 2-23 months were vaccinated, representing 95% of the total target.
  • Read the latest polio update from Syria to see information on cases, surveillance and vaccination campaigns.
  • Learn more about vaccine-derived polioviruses through this short animation or this ‘Coffee with Polio Experts’ video.