John Snow, Asiatic Cholera and the inductive-deductive method

Lecture 3: Incubation period and defining a case and numerator

Snow continues his description of hundreds of cases of cholera which affect communities. Snow remarks that cholera is transmitted from the healthy to the sick over and over again. He corresponded with scores of physicians up and down the country who reported the same set of signs and symptoms: feeling unwell, followed by the excretion of copious amounts…