Tag: polio vaccine

In spring 2022, public health authorities in both the United States and Great Britain reported the discovery of vaccine-derived poliovirus in several environmental samples from their respective countries. In July, the New York State Department of Health informed the CDC that they had identified a case of polio caused by vaccine-derived poliovirus type 2 (VDPV2)… Continue reading Stories from 2022: Vaccine-Derived Polio