Wild Polio Virus Summary:
New wild poliovirus isolates reported this week:
AFP cases: 0
Environment: 4
Others: 0
New cVDPV isolates reported this week:
AFP cases: 2
Environment: 16
Others: 1

Summary of new poliovirus cases and positive environmental samples:
Algeria: one cVDPV2-positive environmental sample
Côte d’Ivoire: three cVDPV2-positive environmental samples
Egypt: one cVDPV2-positive environmental sample
Indonesia: one cVDPV2 case
Mauritania: one cVDPV2 case
Nigeria: three cVDPV2 positive environmental samples
Pakistan: four WPV1 positive environmental samples
Tanzania: one cVDPV2-positive environmental sample
Yemen: seven cVDPV2-positive environmental samples

Afghanistan: No wild poliovirus type 1 (WPV1) cases or positive environmental samples were reported this week. There have been six WPV1 cases reported this year.

Pakistan: No wild poliovirus type 1 (WPV1) cases and four WPV1 positive environmental samples were reported this week There have been six WPV1 cases reported this year.

Officially reported WPV1 and cVDPVcases as of (December 27, 2023):
Wild poliovirus (WPV)
Total global WPV1 cases in 2023: 12 (compared with 30 for the same period in 2022)
Total global WPV1 cases in 2022: 30
Circulating vaccine-derived poliovirus (cVDPV) cases
Total global cVDPV cases in 2023: 428 (compared with 567 for the same period in 2022)
Total global cVDPV cases in 2022: 878

Most recently reported WPV1 case: October 24, 2023, in Pakistan

2020, 2021, 2022, 2023 Wild Polio Cases Comparison (as of Dec. 27th):
2023: 12, 6 in Pakistan and 6 in Afghanistan.
2022: 30, 2 in Afghanistan, 20 in Pakistan, and 8 in Mozambique.
2021: 6, 1 in Pakistan, 1 in Malawi, and 4 in Afghanistan.
2020: 140, 84 in Pakistan and 56 in Afghanistan.