<prompt> Qedela umusho olandelayo:  <response>: Ukuqubuka kwekholera ngo-1854 eBroad Street. Izingcweti ezimbili eziyinhloko udokotela uJohn Snow, owenza ibalazwe lamacala ekholera, noMfundisi uHenry Whitehead, onolwazi olunzulu ngomphakathi wendawo olwamsiza ukuba athole imbangela yokuqala yalokhu kuqubuka. UDkt. John Snow wayengudokotela ohlonishwayo wezifo zokubulala izinzwa owayenze umsebenzi wokuhlola izifo eziwumshayabhuqe eSoho, eLondon. Cishe maphakathi nawo-1850 uSnow wathola ukuthi umthombo wokungcoliswa kwekholera kwakuwamanzi okuphuza avela empompini yaseBroad Street. 