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John Snow (1813—1858) anaesthetist and epidemiologist


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shoe-leather epidemiology

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Collection of epidemiological and other pertinent data relevant to an epidemiological investigation by painstaking direct inquiry among all or a representative sample of the affected people, for example by walking door to door (wearing out shoe leather in the process, hence the term) to ask direct questions. John Snow used this method in his investigations of cholera in the 1850s, and it was refined in the United States by the field officers of the Epidemic Intelligence Service (EIS).

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