<prompt> Pedzisa mutsara unotevera: Chiremba wokuBritain John Snow akashandisa dhayagiramu yakafanana neyaVoronoi muna 1854 kuratidza kuti vanhu vakawanda vakafa sei mu  <response>: Kupararira kwecholera muBroad Street kwakagara pedyo nepombi yemvura yeBroad Street yakanga yabatwa nechirwere kupfuura imwe pombi yemvura ipi neipi. 