John Snow, the "father of epidemiology," is known for deducing the source of which etiologic agent in the 1854 London outbreak?

Question

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John Snow deduced that the source of the 1854 London outbreak was Vibrio cholerae, which was spread through contaminated water. He mapped out the cases of cholera and found that they were clustered around a particular water pump, which he advised to be shut down, leading to a decrease in the number of cases. This helped establish the germ theory of disease and the importance of sanitation in controlling outbreaks.

John Snow, the "Father of Epidemiology," Is Known for Deducing