<prompt> Kuenderera mberi kweiyi ndima - MuLondon muna June 1866, denda renzvimbo muEast End rakauraya vanhu 5.596, sezvo guta racho rakanga richipedza kuvakwa kwenzvimbo dzaro huru dzokurasira tsvina nemvura ona London sewerage system; chikamu cheEast End chakanga chisina kunyatsopedzwa. Nyanzvi yezvirwere William Farr akataura kuti East London Water Company ndiyo yakanga yaita kuti chirwere chacho chipararire. Farr akashandisa basa rapakuvamba rakanga raitwa naJohn Snow navamwe vachiratidza mvura yokunwa yakashatiswa sechikonzero chinobvira checholera mukuputika kwa 1854  <response>: . Kuita nokukurumidza kwakadzivisa kufazve. Mugore rimwe chetero, kushandiswa kwemvura yemumigero yakasvibiswa mumabasa emvura omunzvimbomo kwakaparira kupararira kuduku paYstalyfera muSouth Wales. Vashandi vaibatanidzwa nekambani nemhuri dzavo ndivo vakanyanya kutapurwa, uye 119 vakafa. 