“Vaccine-Derived” Polio on the Rise
The Global Polio Eradication Initiative (GPEI) last week reported that there have been a total of 22 confirmed cases of vaccine-derived polio paralysis, thus far, in 2019. The latest two cases involve a person from Sichuan province in China and a person in Angola. Other evidence of circulating vaccine strain poliovirus type 2 (cVDPV2) has […]