Update on Vaccine-Derived Poliovirus Outbreaks - Worldwide, January 2021-December 2022
Description
Circulating vaccine-derived poliovirus (cVDPV) outbreaks* can occur when oral poliovirus vaccine (OPV, containing one or more Sabin-strain serotypes 1, 2, and 3) strains undergo prolonged circulation in under-vaccinated populations, resulting in
