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Vaccines prevent between 2.5 and 4 million deaths every year.
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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
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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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Asthma cases in Americans are about 75% higher today than they were in 1980.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.