<prompt> Pedzisa mutsara unotevera: Basa raJohn Snow rinoshamisa nokuti rakabatsira kuita kuti pave nokubatana pakati pechirwere checholera nechiveve nemvura dzakasvibiswa, izvo zvakazoita kuti dzidziso yechiasma ipere. Mukati  <response>: denda recholera ra1854, Snow akaronda mwero wakakwirira worufu pakati pavagari veSoho kupombi yemvura muBroad Street. Snow akanyengetedza hurumende yomunzvimbomo kubvisa mubato wepombi, uko kwakaguma nokuderedzwa kunoshamisa kwenhau dzecholera munharaunda yacho. Muna 1857, Snow akaendesa pepa kuBritish Medical Journal iro raitaura kuti nhamba huru yevanhu vaiva nekorera yakakonzerwa nemvura yakanga yakasvibiswa netsvina yevanhu. Snow akashandisa mashoko enhamba kuti aratidze kuti vagari vaiwana mvura yavo kumusoro kwemvura vaiva netarisiro yakaderera zvikuru yokurwara nekorera kupfuura avo vaiwana mvura yavo kumusoro kwemvura. Kunyange zvazvo kunzvera kwake kwakatsigira fungidziro yake yokuti mvura yakasvibiswa, kwete mhepo isina kuchena, yakanga iri manyuko ekorera 