Prevention of smallpox in Alta California during the Franciscan Mission Period (1769-1833).
D002140:California; D049671:History, 18th Century; D049672:History, 19th Century; D006801:Humans; D008921:Religious Missions / Q000266:history; D012899:Smallpox / Q000266:history* / Q000517:prevention & control; D012900:Smallpox Vaccine; D014611:Vaccination / Q000266:history*
D012900:Smallpox Vaccine