Steven Johnson: How the "ghost map" helped end a killer disease

The video discusses the cholera outbreak in 1854 London, highlighting the city's poor public health conditions and the prevailing belief that bad smells caused disease. John Snow, a local doctor, challenged this notion by proving cholera was waterborne, using a map to show the correlation between a contaminated water pump and the outbreak. His work led to significant public health reforms, making large-scale urban living sustainable.

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