Wild Polio Virus Summary:
New wild poliovirus isolates reported this week:
AFP cases: 0
Environment: 12
Others: 0
New cVDPV isolates reported this week:
AFP cases: 7
Environment: 10
Others: 6

Summary of new poliovirus cases and positive environmental samples:
Afghanistan: 10 WPV1-positive environmental samples
Angola: one cVDPV2-positive environmental sample
Pakistan: two WPV1-positive environmental samples
Nigeria: two cVDPV2 cases
Somalia: one cVDPV2 case
South Sudan: three cVDPV2 cases
Yemen: one cVDPV2 case and eight positive environmental samples
Zimbabwe: one cVDPV2-positive environmental sample

Afghanistan: No WPV1 cases and 10 WPV1 positive environmental samples were reported this past week. There were six WPV1 cases reported last year.
Pakistan: No WPV1 cases and two 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 23, 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: 22
Total global cVDPV cases in 2023: 523
Total global cVDPV cases in 2022: 878

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