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What was the catalyst for the cholera outbreak that John Snow tracked down?

  • Contaminated food

  • Airborne particles

  • A water pump

  • Human contact

Answer

John Snow was a physician who was able to track down the cause of a cholera outbreak in London in 1854. He noticed that there was a high concentration of cases in an area around a particular water pump. He hypothesized that the water from the pump was contaminated, and he had the pump handle removed. The outbreak then subsided.
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