[More about Balmis's expedition].
Laval
Enrique R
ER
D002677:Chile; D049671:History, 18th Century; D049672:History, 19th Century; D012899:Smallpox / Q000266:history*; D012900:Smallpox Vaccine / Q000266:history*; D014611:Vaccination / Q000266:history*
D012900:Smallpox Vaccine