New wild poliovirus isolates reported this week:
AFP cases: 2
Environment: 5
Others: 0
New cVDPV isolates reported this week:
AFP cases: 7
Environment: 5
Others: 1

Summary of new poliovirus cases and positive environmental samples:
Afghanistan: No WPV1 cases and five WPV1 positive environmental samples were reported this past week.
Pakistan: Two WPV1 cases and no WPV1 positive environmental samples were reported this past week
Algeria: one cVDPV2 positive environmental sample
Germany: one cVDPV2 positive environmental sample
Guinea: one cVDPV3 case
Nigeria: one cVDPV2 positive environmental sample
Papua New Guinea: two cVDPV2 positive environmental samples
Yemen: six cVDPV2 cases

Officially reported WPV1 and cVDPV cases as of (May 27, 2025):
Wild poliovirus (WPV)
Total global WPV1 cases in 2025: 12 (2 in Afghanistan and 10 in Pakistan)
Total global WPV1 cases in 2024: 99
Total global WPV1 cases in 2023: 12
Total global WPV1 cases in 2022: 30
Total global WPV1 cases in 2021: 6
Total global WPV1 cases in 2020: 140
Circulating vaccine-derived poliovirus (cVDPV) cases
Total global cVDPV cases in 2025: 55
Total global cVDPV cases in 2024: 316
Total global cVDPV cases in 2023: 528
Total global cVDPV cases in 2022: 878

Most recently reported WPV1 cases this year: March 9th in Afghanistan and May 1st in Pakistan.