<prompt> Pedzisa mutsara unotevera:  <response>: Kupararira kwecholera muBroad Street muna 1854. Vanhu vaviri vanonyanya kutaurwa nezvavo ndevanachiremba John Snow, avo vakagadzira mepu yevanhu vane cholera, uye Reverend Henry Whitehead, uyo ruzivo rwake rwakadzama nezvenzanga yomunzvimbomo rwakabatsira kuziva chakanga chaita kuti chirwere chacho chitange. Dr. John Snow akanga ari chiremba anoremekedzwa wemishonga inouraya utachiona uyo aiita basa rokurapa zvirwere muSoho, kuLondon. Munenge pakati pama1850 Snow akaziva kuti tsime rokusvibiswa nekorera raiva mvura yokunwa yaibva papombi yaiva muBroad Street. 