The disease kept spreading. People were at a loss what to do, and the inhabitants fled in droves. On September 2, a doctor by the name of John Snow stepped in to investigate, marking on a map the residences of all those infected. Remarkably, he found that the cases were clustered around a specific spot.
在眾人束手無策、居民紛紛逃離之際，一位名叫約翰．斯諾的醫生於 9 月 2 日著手展開調查，將所有病例的住家位置在地圖上標記出來，赫然發現病例明顯聚集在特定區域內。