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Polio this week

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Pakistan – Health workers reach more than 45 million children

Health workers across Pakistan embarked on the country’s first nationwide immunization campaign to reach more than 45 million children with polio vaccine.  All sectors of civil and public society are regularly mobilized, including through Rotary International, to make such campaigns a success.

nOPV2 by Biological E receives WHO prequalification

Biological E becomes the second full nOPV2 manufacturer, alongside PT Bio Farma, providing diversified, reliable supply of this essential tool to stop variant poliovirus outbreaks.  More.

Summary of new polioviruses this week: 

  • Pakistan:  three WPV1-positive environmental samples
  • Algeria:  two cVDPV2-positive environmental samples
  • Namibia:  two cVDVP2-positive environmental samples
  • Nigeria:  one cVDPV2-positive environmental sample
Country updates as of 18 February 2026

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

  • No WPV1 case was reported this week.  The total number of cases in 2025 is 31 (most recent case:  onset of paralysis on 14 December 2025). 
  • Three WPV1-positive environmental samples were reported this week, collected on 13 January 2026, from Sindh and Balochistan (most recent positive environmental sample:  14 January 2026).

  • No cVDPV1 case was reported this week.  In 2025, one cVDPV1 case was reported (onset of paralysis on 25 January 2025). 
  • No cVDPV1-positive environmental sample was reported this week (most recent positive environmental sample:  17 March 2025).
  • Two cVDPV2-positive environmental samples were reported this week, collected in early January 2026, from Adrar and Tamanghasset (most recent positive environmental sample:  11 January 2026).

  • Two cVDPV2-positive environmental samples were reported this week, collected in early January 2026, from Omaheke and Khomas (most recent positive environmental sample:  7 January 2026).

  • No cVDPV2 cases were reported this week.  The total number of cVDPV2 cases reported in 2025 is 62 (most recent case:  10 December 2025).
  • One cVDPV2-positive environmental sample was reported this week, from Sokoto, collected on 13 January 2026 (most recent positive environmental sample).
  • No cVDPV3 cases are reported this week.  The total number of cVDPV3 cases reported in 2025 is five (most recent case:  onset of paralysis on 26 November 2025).