John Snow, MD (1813-1858) a legenda...

John Snow, MD (1813-1858) a legendary figure in epidemiology, provided single in kind of the earliest examples of using epidemiologic arrangements to identify risk for disease and praise preventive action. Best known for his work in anesthesiology, Snow also had an interest in cholera and supported the unpopular theory that cholera was transmitted from water rather than through miasma (i.e., bad air).

forward August 31, 1854, London experienced a returning epidemic of cholera. Snow suspected water from the Broad road pump as the source of disease. To touchstone his theory, Snow reviewed death records of area residents who died from cholera and interviewed household members, documenting that greatest in quantity deceased persons had lived near and had in liquor water from the pump. Snow not past nor futureed his findings to community leaders, and the cross-examine handle was removed on September 8 1854 Removal of the handle hindered additional cholera deaths, supporting Snow's theory that cholera was a water-borne, contagious disease. Snow's studies and the removal of the interrogate handle became a model for late epidemiology.

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