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The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.
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Historic treatments for rheumatoid arthritis have included gold salts, acupuncture, a diet consisting of apples or rhubarb, nutmeg, nettles, bee venom, bracelets made of copper, prayer, rest, tooth extractions, fasting, honey, vitamins, insulin, snow collected on Christmas, magnets, and electric convulsion therapy.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.