<prompt> Pedzisa mashoko anotevera: Munenge muna 1850, kunaka kwemvura yokunwa kwakava nhau yaifadza vanhu vose, uye John Snow akaongorora mamiriro emvura muna 1849. Paramende yakapa Mutemo Wemvura weMetropolis muna 1852 kuti iite gadziriro dzokuchengetedza kugoverwa kweMetropolis kwemvura yakachena uye ine utano. Pasi pomutemo wacho, zvaiva zvisiri pamutemo kuti kambani ipi neipi yemvura itore mvura yokushandisa mudzimba kubva mumvura inoyerera yeThames pashure pa 31 August 1855, uye kubva pa 31 December 1855 mvura yose yakadaro yaidiwa kuti inyatsosefa. Vatungamiriri vakanga vatosarudza kare muna 1847 kutamisira mvura yokuisa mumadziva avo kuSeething Wells. Zvivako zvakapedzwa muna 1852, uye Lambeth yakabatanidzwa ikoko ichishandisa mapombi ayo kuguta neChelsea Waterworks Company. Zvivako zvacho zvakatamba rutivi muongororo dzaJohn Snow dzokuverenga nhamba mukati  <response>: chirwere checholera, nzvimbo yacho yaiva kumusoro kwerwizi kupfuura dzimwe nzvimbo dzakawanda dzinoshandiswa mvura uye nokudaro yaiva nemvura yakachena, zvichiita kuti vanhu vashomanana vafe necholera. 