Epidemiology

2. History of epidemiology

2.2 From the epidemiology of surveillance…

John Snow (1813-1858)

John Snow (Source Wikipédia)

His work on the London cholera epidemic of 1854, which recorded the number of cholera cases and deaths according to the water supply, led Snow to lay the blame on contaminated fountains and to formulate the hypothesis that cholera was transmitted by contaminated water.

He made this assumption 17 years before the microorganism, Vibrio cholerae, was identified by Robert Koch in 1883.