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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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Despite claims by manufacturers, the supplement known as Ginkgo biloba was shown in a study of more than 3,000 participants to be ineffective in reducing development of dementia and Alzheimer’s disease in older people.
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The longest a person has survived after a heart transplant is 24 years.
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Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
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Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.