<prompt> Qedela umusho olandelayo: UJohn Snow 15 Mashi 1813 16 Juni 1858 wayengudokotela waseNgilandi futhi engumholi ekuthuthukiseni i-anesthesia nokuhlanzeka kwezokwelapha. Ubhekwa njengomunye wabasunguli be-epidemiology yanamuhla, ngokwengxenye ngenxa yomsebenzi wakhe wokulandelela umthombo wesifo  <response>: ukuqubuka kwekholera eSoho, eLondon, ngo-1854, eyayinqandwa ngokususa isibambo sepompo yamanzi. Okutholwe uSnow kwabangela ukuba kusetshenziswe i-anesthesia kanye nezinguquko ezinkulu ezimisweni zamanzi nezokuthuthwa kwendle eLondon, okwaholela ezinguqukweni ezifanayo kwamanye amadolobha, nasekuthuthukeni okukhulu kwezempilo yomphakathi jikelele emhlabeni wonke. 