Was It in the Air? The Killers Too Small to See

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Joseph ListerHistorical profile​·​#5786​·​1962​·​AI-assisted
2nd of 2 versions​·​revised by Richard RileyHistorical profile

Germs cause infectious diseases, and they pass from one person to the next by touch, in water or food, and through the air, on droplets so small that they float. Tuberculosis spreads that way.

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