<prompt> Pedzisa mutsara unotevera:  <response>: denda guru rakaitika muLondon muna 1854, Dr. John Snow akaunganidza mashoko pamusoro pemhosva imwe neimwe, zvikurukuru nzvimbo yadzo muSoho London, achishandisa nzira dzakanga dzichangotanga dzokuongorora nzvimbo uye kutsvakurudzwa kwevanhu kuti agumise kuti mvura yakasvibiswa ndiyo yakanga iri mutakuri wechirwere, uye akabudirira kuvhara tsime racho. Mepu yaiperekedza mushumo wake wa1855 yakaratidza vanhu vakangoerekana vabatwa nechirwere ichi, vakaiswa panzvimbo imwe neimwe, zvichiratidza zvakajeka nzvimbo yaiva pedyo neBroad Street Pump pamwe chete nenzvimbo dzaiva nedzimwe nzvimbo dzaiwanika mvura. Mepu yacho zvino inorumbidzwa sechinhu chinoshandura zvinhu; kunyange zvazvo basa rayo muongororo yacho pachayo nomugumisiro wayo pakugadzirisa gakava pamusoro pechikonzero chechirwere chacho kazhinji kazhinji zvichinyanyowedzerwa, inofanirwa kuzivikanwa nokuda kwokuziva kwaSnow kuti mepu yakanga iri chishandiso chinobudirira zvikurusa chokukurukura mienzaniso yenzvimbo yechirwere chacho. 