TIL an 1854 London cholera outbreak was curbed by a man who defied the day's medical beliefs. Dr John Snow, father of modern epidemiology, traced the outbreak to a tainted water pump. The pump handle was removed, basically ending outbreak. The theory that disease spread by "bad air" soon unraveled.

https://www.theguardian.com/news/datablog/2013/mar/15/john-snow-cholera…
#til #todayilearned
https://www.reddit.com/r/todayilearned/comments/1gjbfwm/til_an_1854_london_cholera_outbreak_was_curbed_by/