Wild Polio Virus Summary:
New wild poliovirus isolates reported this week:
AFP cases: 0
Environment: 0
Others: 0
New cVDPV isolates reported this week:
AFP cases: 20
Environment: 17
Others: 11

Summary of new poliovirus cases and positive environmental samples:
Angola: one cVDPV2-positive environmental sample
Benin: one cVDPV2-positive environmental sample
Chad: two cVDPV2 cases
Cote d’Ivoire: six cVDPV2-positive environmental samples
DR Congo: three cVDPV1 cases and one cVDPV2 case
Guinea: eight cVDPV2 cases and four cVDPV2-positive environmental samples
Niger: one cVDPV2 case and one cVDPV2-positive environmental sample
Nigeria: four cVDPV2 cases and two cVDPV2-positive environmental samples
Senegal: one cVDPV2-positive environmental sample
Yemen: one cVDPV2 case
Zimbabwe: one cVDPV2-positive environmental sample

Afghanistan: No WPV1 cases and No WPV1 positive environmental samples were reported this past week. There were six WPV1 cases reported last year.

Pakistan: No WPV1 cases and No WPV1 positive environmental samples were reported this past week. There were six WPV1 cases reported last year.

Officially reported WPV1 and cVDPV cases as of (January 31, 2024):
Wild poliovirus (WPV)
Total global WPV1 cases in 2024: 0
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 2024: 17
Total global cVDPV cases in 2023: 491
Total global cVDPV cases in 2022: 878
Most recently reported WPV1 case: October 24, 2023, in Pakistan