This Week

Polio this week as of 24 May 2017

 

  • The World Health Assembly (WHA) is meeting this week in Geneva, Switzerland.  Ministers of Health and public health professionals from around the world are discussing global public health issues, including the global drive to eradicate polio.  The Global Polio Eradication Initiative (GPEI) secretariat has prepared a status report, which will inform the discussions by Member States.
  • The Global Polio Eradication Initiative (GPEI) welcomes Dr Tedros Adhanom Ghebreyesus, the new Director-General-elect of the World Health Organization, and looks forward to working with him to achieve a polio-free world. More.
  • Two separate outbreaks of circulating vaccine derived poliovirus type 2 (cVDPV2) have been reported in the Democratic Republic of the Congo, one in Haut Lomami province and one in Maniema.
  • Health Ministers of the Group of Twenty have emphasized the importance of polio eradication and transition planning efforts at their inaugural meeting in Berlin, Germany. More.
  • Polio staff in Nigeria have contributed emergency response expertise to a meningitis outbreak in Sokoto State. More.
  • Summary of newly-reported viruses this week: Afghanistan, one new wild poliovirus type 1 (WPV1) environmental sample. Pakistan, seven new WPV1 environmental samples. Democratic Republic of the Congo, four new cases of circulating vaccine derived poliovirus type 2 (cVDPV2) and one isolate from a healthy individual in the community. For more, see relevant country sections.

 

NA: onset of paralysis in most recent case is prior to 2015. Figures exclude non-AFP sources. Lao PDR cVDPV1, all others cVDPV2. cVDPV definition: see document “Reporting and classification of vaccine-derived polioviruses” at [pdf]

Weekly country updates as of 24 May 2017

  • No new wild poliovirus type 1 (WPV1) cases were reported in the past week.  The total number of cases for 2017 remains three, and for 2016 remains 13.  The most recent case had onset of paralysis on 21 February, from Kunduz province.
  • One new environmental sample positive for WPV1 was reported in the past week in Lashkargah district, Hilmand province, with date of collection on 26 April.
  • With most of Afghanistan polio-free, efforts are focused on continuing to strengthen operations, in close coordination with Pakistan, to address remaining low-level transmission in the common reservoir area of the Quetta-Kandahar corridor.
  • No new wild poliovirus type 1 (WPV1) cases were reported in the past week. The total number of WPV1 cases for 2017 remains two, and for 2016 remains 20.  The most recent case had onset of paralysis on 13 February, from Diamir district, Gilgit Baltistan.
  • Seven new positive WPV1 environmental samples were reported in the past week; three in Balochistan province, with two in Quetta district and one in Killa Abdullah; two in Rawalpindi district, Punjab province; one in Sukkur district, Sindh province; and one in CDA, Islamabad.  Dates of collection were between 10 April and 10 May.
  • The year 2016 saw the lowest ever annual number of polio cases in the country but poliovirus continues to be isolated through environmental surveillance over a significant geographical range. Efforts are ongoing through implementation of the national emergency action plan to address remaining gaps in coverage and surveillance, in close coordination with neighbouring Afghanistan.
  • No new cases of wild poliovirus type 1 (WPV1) were reported in the past week.  The total number of WPV1 cases for 2016 remains four and no cases have been reported in 2017.  The most recent case had onset of paralysis on 21 August 2016 in Monguno Local Government Area (LGA), Borno.
  • Nigeria continues to implement emergency response to the detected WPV1 strain and circulating vaccine-derived poliovirus type 2 (cVDPV2) strains affecting the country.
  • The response is part of a broader regional outbreak response, coordinated with neighbouring countries, in particular the Lake Chad sub-region, including northern Cameroon, parts of Central African Republic, Chad and southern Niger.
  • Detection of the polio cases in Nigeria underscores the risk posed by low-level undetected transmission and the urgent need to strengthen subnational surveillance.
  • The detection of wild poliovirus type 1 (WPV1) and circulating vaccine-derived poliovirus type 2 (cVDPV2) in Nigeria poses a risk to the neighbouring countries of the Lake Chad basin and hence an outbreak response plan is being implemented as part of the response to the Nigeria outbreak.
  • Emergency outbreak response efforts continue across the Lake Chad basin, together with activities to fill subnational surveillance gaps across the region.
  • Two separate outbreaks of circulating vaccine derived poliovirus type 2 (cVDPV2) have been reported in the Democratic Republic of the Congo.
  • In Haut Lomami province, two cases of cVDPV2 have been reported, one in Butumba district with onset of paralysis on 8 March and one in Malemba-Nkulu district on 20 February.
  • In Maniema province, two cases of cVDPV2 have been reported, one in Kindu district with onset of paralysis on 26 March and one in Kunda district on 18 April. One additional isolate has been detected in a healthy individual from the community in Kindu district, with the sample collected on 2 May.
  • Outbreak response plans are currently being finalised, with supplementary immunization activities using monovalent oral polio vaccine type 2 (mOPV2) in line with internationally-agreed outbreak response protocols. Surveillance and immunization activities are being strengthened in neighbouring countries.
  • The Democratic Republic of the Congo is also affected by an Ebola outbreak, in Bas Uele province in the north of the country.  Coordination among both outbreak response teams will be necessary and teams are already working on this