Attachments
Wild poliovirus type 1 (WPV1)
Cases: No new WPV-1 positive cases reported this week. In total, 39 WPV1-positive cases have been confirmed in 2025 (9 from Afghanistan and 30 from Pakistan in 2025).
Environment: Two new WPV-1 positive environmental samples were reported from Pakistan this week. The newly reported ES are from Punjab province (Faisalabad district) and Sindh province (Karachi East town) with samples collection dates on 11th and 17th September 2025 respectively. In total, 579 WPV1-positive environmental samples have been reported in 2025 (64 from Afghanistan and 515 from Pakistan).
Circulating vaccine-derived poliovirus (cVDPV)
Cases:
• cVDPV2: No new cVDPV2 cases reported this week. The cVDPV2 case count in 2025 to date is 33 (29 from Yemen, 2 from Sudan, and 1 each from Djibouti and Somalia)
Environment:
• cVDPV1: No new cVDPV1 isolates were reported this week. cVDPV1 was confirmed in 9 environmental samples in 2025 to date (all from Djibouti)
• cVDPV2: One new cVDPV2-positive environmental sample was reported this week from Djibouti. The new isolate was reported from Arta province (Arta district) with sample collection date on 18th May 2025. The cVDPV2 was confirmed in 40 sewage water samples in 2025 (17 from Djibouti, 9 from Yemen, 7 from occupied Palestinian territory, 6 from Somalia, and 1 from Sudan).