Update on Vaccine-Derived Poliovirus Outbreaks - Worldwide, January 2018-June 2019
by from Morbidity and Mortality Weekly Report (MMWR) on (#4V4RC)
Since the launch of the Global Polio Eradication Initiative in 1988 and broad use of live, attenuated oral poliovirus vaccine, the number of wild poliovirus cases has declined >99.99%.