Smallpox vaccination--update. 1981.
Banker
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DD
D049673:History, 20th Century; D006801:Humans; D012899:Smallpox / Q000266:history* / Q000517:prevention & control; D012900:Smallpox Vaccine / Q000009:adverse effects / Q000266:history*; D014611:Vaccination / Q000266:history*
D012900:Smallpox Vaccine