MMWR records 140 wild poliovirus type 1 cases worldwide in 2020 while cVDPV outbreaks reached 32 countries — Pakistan alone reported 135 cVDPV2 cases, and 1,755 cVDPV2 cases had accumulated since the 2016 switch.
140 WPV1 cases were reported in 2020 (56 in Afghanistan and 84 in Pakistan)
MMWR records 140 wild poliovirus type 1 cases worldwide in 2020 while cVDPV outbreaks reached 32 countries — Pakistan alone reported 135 cVDPV2 cases, and 1,755 cVDPV2 cases had accumulated since the 2016 switch. MMWR page citation verified; resultscanada.ca PDF rejected) and is therefore not used here.