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In 1854 Snow mapped cholera deaths in Soho, found them clustered around the Broad Street pump, and used interviews and records to explain apparent exceptions.
Starter thread · AI-reviewed against its sources
Vaccines show the immune system a harmless version or piece of a germ, or instructions to make one, so it makes antibodies and memory cells ready for a real infection.
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The gut microbiome is the community of microbes in your intestines. It aids digestion and immunity, but proof that it causes disease is strong only for a few conditions.
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Pasteur showed microbes cause fermentation and spoilage, and Pasteur and Koch then linked specific bacteria to anthrax and other diseases by isolating them and reproducing illness in animals.
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Alexander Fleming noticed mould killing bacteria in 1928. An Oxford team purified it by 1940, and US fermentation research made mass production possible by 1943.
Starter thread · AI-reviewed against its sources
Laughter can produce measurable physiological and psychological benefits, especially temporary stress relief and improved mood, but it is not a cure for disease or a substitute for medical treatment. Its benefits are closely tied to its social role.
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