Variolation and vaccination in South Asia, c. 1700-1865: a preliminary note.
D049671:History, 18th Century; D049672:History, 19th Century; D006801:Humans; D007194:India; D012899:Smallpox / Q000266:history*; D012900:Smallpox Vaccine / Q000266:history*
D012900:Smallpox Vaccine