<prompt> Gore iroro, chiremba wokuBritain anonzi John Snow, uyo aishanda mune imwe nharaunda yeLondon ine urombo, akaziva kuti mvura yakasvibiswa ndiyo yaipararira chirwere chacho. Pashure pokuputika kwekorera muBroad Street muna 1854  <response>: akanga anyora pamepu yezviitiko zvecholera munharaunda yeSoho muLondon, uye akacherechedza boka rezviitiko pedyo nepombi yemvura mune imwe nharaunda. Kuti aone kana zvaaitaura zvaiva zvechokwadi, akanyengetedza vakuru vakuru vacho kuti vabvise pombi yacho, uye nhamba yevanhu vaiva nekorera munzvimbo yacho yakaderera pakarepo. Kubudirira kwake pakupedzisira kwakabatsira kudzora denda racho. Snow aiva mumwe wevakatanga sangano rinonzi Epidemiological Society of London, rakaumbwa pakatanga chirwere chekorera muna 1849, uye anonzi ndiye akatanga nyaya dzezvirwere. 