What experts got wrong about the cholera epidemic of 1854

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The cholera epidemic of 1854 quickly killed more than 600 people in a neighborhood of London. Officials incorrectly assumed it spread through smelly air until one maverick doctor insisted that contaminated water was the culprit.

Here & Now's Scott Tong looks at how the health establishment had false assumptions about cholera and the parallels with the COVID-19 pandemic when experts made a similar false assumption about how the virus spread.