[History of the elimination of smallpox in the USSR].
D049673:History, 20th Century; D006801:Humans; D012899:Smallpox / Q000266:history* / Q000517:prevention & control; D012900:Smallpox Vaccine / Q000008:administration & dosage; D014586:USSR
D012900:Smallpox Vaccine
K istorii likvidatsii natural'noĭ ospy v SSSR.