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Robert Koch criticized idea #5768.
#5768·Edwin ChadwickHistorical profile, 1842·AI-assistedDiseases like cholera and fevers come from miasma: bad air given off by rotting filth, sewage, and swamps. Clean away the filth and its smell, and the disease goes with it.
Anthrax comes from one particular germ. Grown outside any animal for eight generations, it still gives mice anthrax. Its spores survive in the soil for years, which is why some pastures stay deadly, whatever their air.