Robert Koch, a German doctor in the 1800s, proved that cholera was caused by a bacterium found in polluted water, not by bad air or superstition, which established the foundation of modern germ theory and transformed how medicine approaches infectious diseases.
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The Doctor Who Found the Enemy Hiding in WaterAdded:
What if one man could trap invisible killers? Robert Koch was a German doctor in the 1800s when deadly disease spread with almost no answers.
>> [music] >> Then he went after one of history's biggest killers, cholera. In a tiny lab, Koch studied polluted water and proved the disease was caused by a bacterium, not bad air or superstition. [music] That was the turning point. He showed that invisible germs could be found, named, and defeated. His discovery changed how doctors fought epidemics and it helped build modern germ theory. Koch proved that science could uncover the enemy hiding in plain [music] sight. You think Koch's discovery changed the world the most?
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