Mr N the milker, and Dr Koch's concept of the healthy carrier.
Mortimer
P P
PP
Hepatitis and Retrovirus Laboratory, Virus Reference Division, Central Public Health Laboratory, London, UK. PMortimer@phls.co.uk
D000818:Animals; D002353:Carrier State; D003612:Dairying; D004196:Disease Outbreaks / Q000266:history*; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D008892:Milk / Q000382:microbiology; D014435:Typhoid Fever / Q000453:epidemiology / Q000266:history* / Q000635:transmission; D006113:United Kingdom / Q000453:epidemiology