Wild Polio Virus Summary:

New wild poliovirus isolates reported this week:
AFP cases: 0
Environment: 11
Others: 0
New cVDPV isolates reported this week:
AFP cases: 9
Environment: 16
Others: 11

Summary of new poliovirus cases and positive environmental samples:
Afghanistan: No WPV1 cases and no positive environmental samples
Chad: one cVDPV2 case and one positive environmental sample
Guinea: one cVDPV2 case
Liberia: two cVDPV2 positive environmental samples
Niger: three cVDPV2 positive environmental samples
Nigeria: six cVDPV2 cases and three positive environmental samples
Occupied Palestinian Territory: six cVDPV2 positive environmental samples
Pakistan: one WPV1 case and nine WPV1-positive environmental samples
Sierra Leone: one cVDPV2-positive environmental sample
Yemen: one cVDPV2 case

Afghanistan: No WPV1 cases and no WPV1 positive environmental samples were reported this past week. There were six WPV1 cases reported last year.
Pakistan: One WPV1 cases and nine 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 (July 17, 2024):
Wild poliovirus (WPV)
Total global WPV1 cases in 2024: 18
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: 127
Total global cVDPV cases in 2023: 526
Total global cVDPV cases in 2022: 878

 Most recently reported WPV1 case: June 28, 2024, in Pakistan.