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TIL That John Snow, who found the cause of cholera during the height of an epidemic, proved his findings by halting an entire outbreak through one action- removing the infected water pump handle.
TIL That John Snow, who found the cause of cholera during the height of an epidemic, proved his findings by halting an entire outbreak through one action- removing the infected water pump handle.
Headmaster
11月 18, 2019
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