title: [Smallpox since 1520 till the Balmis expedition].
mesh_terms: D049669:History, 16th Century; D049670:History, 17th Century; D049671:History, 18th Century; D049672:History, 19th Century; D006801:Humans; D008800:Mexico; D012899:Smallpox / Q000266:history* / Q000276:immunology / Q000517:prevention & control; D012900:Smallpox Vaccine / Q000266:history*; D013030:Spain; D014611:Vaccination / Q000266:history
chemical_list: D012900:Smallpox Vaccine
vernacular_title: La viruela desde 1520 hasta la expedición de Balmis.