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: 20
Environment: 2
Others: 0

Summary of new poliovirus cases and positive environmental samples:
DR Congo: two cVDPV1 cases, one cVDPV2 case, one cVDPV2-positive environmental sample
Guinea: ten cVDPV2 cases
Madagascar: one cVDPV1 case, one cVDPV1-positive environmental sample
Mali: three cVDPV2 cases
Niger: one cVDPV2 case
Pakistan: four WPV1 positive environmental samples
South Sudan: one cVDPV2 case
Tanzania: one cVDPV2 case

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 cVDPV cases as of (January 3, 2024):
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: 447 (compared with 581 for the same period in 2022)
Total global cVDPV cases in 2022: 878

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