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Polio this week

A virus anywhere can be a threat everywhere – outbreak response simulation helps readiness
The best outbreak response starts before an outbreak occurs. Regular simulation exercises help ensure countries are ready to quickly detect and respond to polio and other health threats, protecting communities and strengthening health security.  Read more about such an exercise recently held in Egypt.

Polio forgotten, but not gone – podcast by London School of Hygiene and Tropical Medicine
Part of the award-winning podcast series LSHTM Viral, focusing on science behind global and public health, Polio:  Forgotten But Not Gone, explores the continued risk of polio resurgence and what is needed to sustain progress towards eradication. It features Team End Polio Champion and polio survivor Anne Wafula Strike, who speaks about the lifelong impact of polio and the role of advocacy in keeping attention on eradication. Professor Sir Andrew Pollard, Director of the Oxford Vaccine Group, discusses polio vaccines, wastewater detection and barriers to childhood immunisation in the UK.  And Dr. Zubair Wadood from WHO addresses vaccine misinformation and outlines some of the geopolitical, conflict-related and community trust challenges that continue to shape eradication efforts in Pakistan and Afghanistan.  The episode frames polio as a continued global health security concern, particularly in the context of recent polio wastewater detections in London, declining immunisation rates and pressure on surveillance funding.

Summary of new polioviruses this week: 

  • Pakistan:  three WPV1-positive environmental samples
  • Chad:  two cVDPV2 cases and one cVDPV3 case
  • Ethiopia:  two cVDPV1 cases
  • Madagascar:  one cVDPV1 case
  • Nigeria:  one cVDPV2 case
Country updates as of 8 July 2026

More information on the countries that have reported cases and/or environmental samples this week.

  • No WPV1 cases were reported this week (most recent case:  7 April 2026).  The total number of cases in 2025 is 31. The total number of cases in 2026 is three.
  • Three WPV1-positive environmental samples were reported this week, from Khyber Pakhtunkhwa and Balochistan, collected in early June 2026 (most recent positive environmental sample:  9 June 2026).

  • Two cVDPV2 cases were reported this week, from Hadjer Lamis and Salamat, with onsets of paralysis on 20 April 2026 and 21 April 2026 (most recent case).  The number of cVDPV2 cases in 2025 is 33.  The number of cVDPV2 cases in 2026 is six.
  • No cVDPV2-positive environmental samples were reported this week (most recent positive environmental sample:  04 February 2026).
  • One cVDPV3 case was reported this week, from Chari Baguirmi, with onset of paralysis on 6 May 2026 (most recent case). It is the first reported cVDPV3 case in 2026.  The number of cVDPV3 cases for 2025 is four.

  • Two cVDPV1 cases were reported this week, from South Ethiopia, with onsets of paralysis on 1 May 2026 and 22 May 2026 (most recent case).  The number of cVDPV1 cases in 2026 is seven.
  • No cVDPV2 case was reported this week. The total number of cases reported in 2025 is 40 (most recent case: 7 October 2025).

  • One cVDPV1 case was reported this week, from Sud-Ouest, with onset of paralysis on 13 May 2026 (most recent case).  There are two cases reported in 2026. 

  • One cVDPV2 case was reported this week, from Sokoto, with onset of paralysis on 29 May 2026 (most recent case).  The total number of cVDPV2 cases reported in 2025 is 66.  The total number of cVDPV2 cases reported in 2026 is 28. 
  • No cVDPV2-positive environmental sample was reported this week (most recent positive environmental sample:  30 May 2026).
  • No cVDPV3 cases were reported this week.  The total number of cVDPV3 cases in 2025 is eight.  The total number of cVDPV3 cases in 2026 is six (most recent case:  25 April 2026).