<prompt> Nyorai kupfuurira kweiyi ndima - Chimwe chezviitiko zvomuzvarirwo zvapakuvamba zvikuru chakanga chiri 1854 Broad Street kupararira kwekorera  <response>: kuLondon, England. Musi waAugust 31, 1854, hosha huru yekorera yakarova Soho. Mumazuva matatu akatevera, vanhu 127 vaiva pedyo neBroad Street vakafa. Pakupera kwedenda racho vanhu 616 vakafa. Chiremba anonzi John Snow akaziva kuti paiva nepombi yemvura yaiva pedyo, achishandisa mepu yevanhu vainge vafa uye vairwara iyo yairatidza kuti paiva nevanhu vakawanda vaiva nechirwere ichi pedyo nepombi yacho. 