Buuxi weedha soo socota: Shaqadu waxay daboolaysaa
1854 Cudurka shuban biyoodka oo ka dillaacay Broad Street. Labada qof ee ugu waawayn waa dhakhtarka John Snow, kaasoo sameeyay khariidada kiisaska kolera, iyo Reverend Henry Whitehead, oo aqoontiisa baaxada leh ee bulshada deegaanka ka caawisay go'aaminta sababta bilowga ah ee dillaaca. Dr. John Snow waxa uu ahaa dhakhtar caan ah oo ku takhasusay suuxdinta, wuxuuna ka shaqeyn jiray cudurada faafa ee ka dillaaca Soho, London. Bartamihii 1850kii Snow wuxuu ogaaday in cudurka kolera uu ka dhashay biyaha la cabo ee ka yimaada bamka Broad Street.