Smallpox eradication--the final battle.
D004196:Disease Outbreaks; D004197:Disease Reservoirs; D005843:Geography; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D012899:Smallpox / Q000453:epidemiology / Q000266:history / Q000517:prevention & control*; D012900:Smallpox Vaccine / Q000008:administration & dosage; D014611:Vaccination
D012900:Smallpox Vaccine