This article is a response to ‘The case for the oral polio vaccine in the world’s quest for eradication’, July 21, 2023, by Vipin M. Vashishtha and Puneet Kumar.
In 2022, after more than a decade of remaining polio-free, the U.S., the U.K, Israel and Canada reported type 2 vaccine-derived poliovirus in environmental samples. The U.S. (Rockland County in New York) also reported one case of polio in a young adult caused by type 2 vaccine-derived poliovirus (VDPV) in July 2022.
What caused the type 2 VDPV case to emerge in the U.S.?
