קראו את הקטע וענו על השאלות: מגפת הכולרה ומפת הרחובות

In the summer of 1854, a deadly outbreak of cholera swept through a crowded district of London, killing hundreds within days. The prevailing theory blamed “bad air” rising from filth, a vague idea that explained little and prevented nothing. A local physician named John Snow suspected instead that the disease spread through contaminated water. Rather than argue in the abstract, he did something quietly revolutionary: he mapped the deaths, marking each one on a street plan of the neighbourhood. The pattern was striking. Cases clustered tightly around a single public water pump, while people who drew water elsewhere were largely spared. Snow persuaded the authorities to remove the pump’s handle, and although the outbreak was already fading, his careful reasoning helped establish a new way of thinking about disease. His map is now celebrated as a founding moment in epidemiology, the study of how illness moves through populations. What made his work powerful was not a microscope or a cure, neither of which he possessed, but a willingness to gather evidence patiently and let a visible pattern overturn a comfortable but mistaken belief. It is a lesson that reaches far beyond medicine.

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