John Snow

(1813—1858) anaesthetist and epidemiologist

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(1813–1858) A London physician, a founding figure of modern epidemiology, and a pioneer anesthetist. Snow's main contributions to epidemiology were his demonstrations of the importance of logical reasoning, the use of spot maps to display the progress of epidemics of cholera, and the application of rigorous numerical methods in which comparisons were based on proportions or rates rather than merely on general impressions and anecdotes.

From A Dictionary of Public Health in Oxford Reference.

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