https://ourworldindata.org/grapher/cases-of-paralytic-polio-from-vaccine-derived-viruses
Some cases of paralytic polio arise from vaccine-derived poliovirus strains that have reverted into a form that can cause disease. The total number of cases...
paralytic polioreportedcasesvaccinederived
https://ourworldindata.org/grapher/cases-of-paralytic-polio-from-vaccine-derived-viruses?tab=chart&country=SLV
Some cases of paralytic polio arise from vaccine-derived poliovirus strains that have reverted into a form that can cause disease. The total number of cases...
paralytic polioreportedcasesvaccinederived