Polio's last stand.
Clarke
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D004196:Disease Outbreaks; D006801:Humans; D009154:Mutation; D011051:Poliomyelitis / Q000453:epidemiology* / Q000821:virology; D017955:Poliovirus / Q000235:genetics / Q000472:pathogenicity; D011055:Poliovirus Vaccine, Oral / Q000009:adverse effects*; D012109:Research Support as Topic; D014613:Vaccines, Attenuated; D014900:West Indies / Q000453:epidemiology; D014944:World Health Organization
D011055:Poliovirus Vaccine, Oral; D014613:Vaccines, Attenuated