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如果这些粪便污染了供水（由于缺乏适当的污水处理），或者感染的人在不洗手的情况下处理食物或烹饪用具，那么感染的人会经过大量细菌，如果这些粪便污染了供水（由于缺乏适当的污水处理），那么细菌在1854年在1854年传播到未感染的人，伦敦的霍乱临床是伦敦的霍乱临床。 of the disease after encountering an outbreak in a mining village in 1832, and so was familiar with the symptoms and mechanisms for transmission His prior experience provided a fundamental insight which helped him to identify the cause of the outbreak in Soho He mapped the cases of cholera and traced them all back to one water pump The pump handle was removed and the outbreak came to an end Later it was noted that the water pump was positioned only a few feet from a cesspit which was在这种情况下，被霍乱霍乱霍乱的霍乱约翰·斯诺（John Snow）的仔细观察污染，促进了霍乱的这种传播，并提供了有用的证据，这些证据纳入了“胚芽”疾病理论，这些理论彻底改变了19世纪的儿童发烧
防御疾病| HL IB生物学修订说明2025
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