Wild Polio Virus Summary:
New wild poliovirus isolates reported this week:
AFP cases: 1
Environment: 17
Others: 0
New cVDPV isolates reported this week:
AFP cases: 0
Environment: 6
Others: 0

Summary of new poliovirus cases and positive environmental samples:

Afghanistan: one WPV1 case and five positive environmental samples
Pakistan: 12 WPV1-positive environmental samples
Liberia: one cVDPV2 positive environmental sample
Madagascar: five cVDPV1 positive environmental samples

Afghanistan: One WPV1 case and five WPV1 positive environmental samples were reported this past week. There were six WPV1 cases reported last year.

Pakistan: No WPV1 cases and twelve 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 (April 11, 2024):
Wild poliovirus (WPV)
Total global WPV1 cases in 2024: 4
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: 12
Total global cVDPV cases in 2023: 523
Total global cVDPV cases in 2022: 878

Most recently reported WPV1 case: February 29, 2024, in Pakistan.