John Snow, Asiatic Cholera and the inductive-deductive method

Lecture 9: the Horsleydown and Battersea outbreaks and the importance of an accurate investigation with an open mind

Fitting in with the obsessive and determined way Snow investigated cholera outbreaks is his examination of the 1849 outbreak in Albion Terrace, Wandsworth, Deptford and Thomas Street, all in South London. Horselydown was where the 1848 index case found lodgings - see Lecture 2. The index case is the first documented case in any outbreak or case of speci…