<prompt> Qedela umusho olandelayo: Ucwaningo lukaJohn Snow mayelana  <response>: Ukuqubuka kwekholera eLondon kubhekwa njengesifundo sokuqala semvelo esixazulula inkinga yezempilo. Wasebenzisa ibalazwe lokufa ngenxa yekholera ukuze athole ukuthi umthombo wekholera kwakuyipompo eseBroad Street. Wasusa isibambo sepompo ngo-1854 futhi abantu bayeka ukufa lapho. Kwaze kwaba yilapho uRobert Koch ethola igciwane eminyakeni eminingi kamuva lapho indlela yokudluliselwa kwekholera yaqondwa khona. 