Dr. John Snow found that cholera cases in London were

Question

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Dr. John Snow discovered that cholera cases in London were spatially associated with certain public wells, which he suspected were contaminated with the disease. He found that people who lived closer to the contaminated wells were more likely to contract cholera than those who lived farther away. This led him to conclude that cholera was waterborne, rather than being transmitted through the air or by other means.

Dr John Snow Found That Cholera Cases in London Were