The history of smallpox: an old story of current significance.
D049671:History, 18th Century; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D012899:Smallpox / Q000266:history* / Q000517:prevention & control; D012900:Smallpox Vaccine / Q000266:history*; D014611:Vaccination
D012900:Smallpox Vaccine