In the mid-19th century the world (destroy) by cholera, a disease that killed thousands. In London, the epidemic (流行病) was particularly severe, with bodies piling up and fear running wild. In this chaos, a man name d John Snow rose (challenge) the invisible enemy.
John Snow, medical doctor, had a keen interest in finding the source of cholera. He was not convinced by the then-common belief cholera was spread through bad air. His suspicions were aroused he noticed that most cases were concentrated around a single water pump in Soho. He investigated deeper, mapping the pumps and (associate) them with cholera cases.
With detailed observation and courageous experimentation, John Snow identified the polluted water the "criminal" behind the epidemic. He convinced authorities to remove the handle of the pump, (effective) stopping the spread of cholera. His actions saved (count) lives and marked a significant turning point in public health history.
John Snow's lasting impact serves as a (remind) of the strength of observation, logical reasoning, and decisive action in the face of challenges.
