<prompt> Bhala ukuqhubeka kwalesi sigaba - Le ndawo iyaphawuleka ngokuqubuka kwekholera ngo-1854  <response>: okuholela ekusetshenzisweni ngokushesha kwezimiso eziyisisekelo ze-epidemiological ukuxazulula inkinga. UJohn Snow, udokotela owabona ukuthi amacala ayegxile eduze kwepompo eseBroad Street waveza okutholakele esithombeni esisekelwe ebalazweni. Kwaholela ekutheni ipompo livalwe futhi ukwehla kwamacala ekholera kwaba okusheshayo. 