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Explain why the work of John Snow was important. (7 marks).
In1854, there was a cholera epidemic, which killed approximately 12,000 people. John Snow proved the link between dirty water and cholera by doing an investigation. In 1855, he discovered that cholera was a waterborne disease.
John Snow's work was important, as people in later years may not have been able to work out what causes cholera, even though many people had disagreed with him.The water pump that he had initially took out during his investigation was replaced, because many people didn't believe that John Snow was correct.
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