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: 3
Environment: 0
Others: 1

Summary of new poliovirus cases and positive environmental samples:
DR Congo: one cVDPV1 case and no cVDPV positive environmental samples
Chad: one cVDPV2 case and no cVDPV positive environmental samples
Nigeria: one cVDPV2 case and no cVDPV positive environmental samples

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 (April 17, 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: 15
Total global cVDPV cases in 2023: 523
Total global cVDPV cases in 2022: 878

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