Wild Polio Virus Summary:
New wild poliovirus isolates reported this week:
AFP cases: 0
Environment: 10
Others: 0
New cVDPV isolates reported this week:
AFP cases: 15
Environment: 7
Others: 2

Summary of new poliovirus cases and positive environmental samples:
Afghanistan: seven WPV1-positive environmental samples
Chad: one cVDPV2 case
Cote d’Ivoire: one cVDPV2 case and one cVDPV2-positive environmental sample
DR Congo: four cVDPV1 cases and one cVDPV2 case
Mozambique: one cVDPV1 case
Nigeria: six cVDPV2 cases
Pakistan: three WPV1-positive environmental samples
South Sudan: one cVDPV2 case
Zimbabwe: six cVDPV2-positive environmental samples

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

Pakistan: No WPV1 cases and three 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 17, 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: 15
Total global cVDPV cases in 2023: 454
Total global cVDPV cases in 2022: 878
Most recently reported WPV1 case: October 24, 2023, in Pakistan