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March 10th Polio Update

New wild poliovirus isolates reported this week:
AFP cases: 3

Environment: 28
Others: 0
New cVDPV isolates reported this week:
AFP cases: 13

Environment: 9
Others: 2

Summary of new poliovirus cases and positive environmental samples:
Algeria: two cVDPV2 positive environmental samples were reported this past week.
Cameroon: one cVDPV2 case and one cVDPV2 positive environmental sample were reported this past week.
Chad: four cVDPV2 cases and three cVDPV2 positive environmental samples were reported this past week.
Djibouti: one cVDPV2 case and two cVDPV2 positive environmental samples were reported this past week.
Guinea: one cVDPV2 positive environmental sample was reported this past week.
Nigeria: seven cVDPV2 cases were reported this past week.

Afghanistan: No WPV1 cases
and no WPV1 positive environmental samples were reported this past week. There were 25 WPV1 cases reported last year.
Pakistan: Three WPV1 cases and twenty-eight WPV1 positive environmental samples were reported this past week. There were 74 WPV1 cases reported last year.

Officially reported WPV1 and cVDPV cases as of (February 10, 2025):
Wild poliovirus (WPV)
Total global WPV1 cases in 2025: 6
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: 13

Total global cVDPV cases in 2024: 293

Total global cVDPV cases in 2023: 528
Total global cVDPV cases in 2022: 878

Most recently reported WPV1 cases this year: January 27th in Afghanistan and February 10th in Pakistan.