<prompt> Pedzisa mutsara unotevera: John Snow, piyona wokurapa kushaya hope, aigara panhamba 18 kubva muna 1852 kusvikira parufu rwake muna 1858. Snow anoonekwa somumwe wababa vechirwere chemazuva ano, zvimwe nemhaka yebasa rake rokutsvaka kwaibva chirwere ichi.  <response>: denda recholera muSoho, London, muna 1854. 