Airborne contagion. Historical background.
D000391:Air Microbiology; D003141:Communicable Diseases / Q000266:history* / Q000635:transmission; D004196:Disease Outbreaks; D004812:Epidemiologic Methods; D049672:History, 19th Century; D049673:History, 20th Century; D049690:History, Ancient; D006801:Humans