2) In 1554, a cholera outbreak occurred in London. Cholera is a disease that causes intense
diarrhea and can be fatal. At the time, many people believed that diseases were caused by "bad
air John Snow had another idea; he thought that cholera was caused by something in the
environment where people lived. He went door to door and made a map showing households that
had cholera. He found that most of the cases were near the Broad Street Water Pump. John Snow
made a case that the water from the pump was making people sick and the pump was shut down.
REASONING: If water was the cause of the sickness, then ...
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