<prompt> Ramba uchinyora ndima iyi - Kurapa mvura nokukurumidza kwakava kwakakurumbira, uye kunaka kwegadziriro yacho kwakaitwa kwakajeka zvikuru pashure pokutsvakurudza kwachiremba John Snow mukati mokupararira kwekorera muBroad Street muna 1854  <response>: . Snow akanga asina chokwadi nedzidziso yaivapo panguva iyoyo yechiasma yaiti zvirwere zvaikonzerwa nemhepo yakaipa ine ngozi. Kunyange zvazvo dzidziso yokuti utachiona hunokonzera zvirwere yakanga isati yavapo, zvaiongororwa naSnow zvakaita kuti arambe dzidziso yaivapo. Nyaya yake ya1855 yaiti On the Mode of Communication of Cholera yakaratidza zvakajeka kuti mvura yaibatsira sei pakuparadzira chirwere checholera muSoho, achishandisa mepu ine madonhwe uye uchapupu hwokuverenga kuti aratidze kubatana kwainge kwakaita kunaka kwemvura nenjodzi dzecholera. Mashoko ake akanyengetedza kanzuru yomunzvimbomo kudzima pombi yemvura, iyo yakakurumidza kugumisa denda racho. 