Strategies that led to the eradication of smallpox in Puerto Rico, 1882-1921.
D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D011647:Puerto Rico; D012899:Smallpox / Q000266:history* / Q000517:prevention & control; D012900:Smallpox Vaccine / Q000266:history*; D014611:Vaccination / Q000266:history
D012900:Smallpox Vaccine