Rubuta ci gaba don wannan sakin layi - Ba da daɗewa ba aikin kula da ruwa ya zama gama gari, kuma kyawawan halaye na tsarin sun bayyana a fili bayan binciken likitan John Snow a lokacin barkewar cutar kwalara ta 1854 Broad Street
Ka yi haƙuri. Snow yana da shakku game da ka'idar miasma da ta fi rinjaye a lokacin da ta ce cututtuka na haifar da cutarwa "mummunan iska". Ko da yake ba a riga an kafa ka'idar ƙwayoyin cuta ba, abin da Snow ya lura ya sa ya yi watsi da ka'idar da ake da ita a lokacin. Rubutun sa na 1855 "A kan Hanyar Sadarwar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Cutar Bayanansa sun shawo kan majalisa na gari don kashe famfon ruwa, wanda ya kawo karshen barkewar cutar.