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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.
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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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The first successful kidney transplant was performed in 1954 and occurred in Boston. A kidney from an identical twin was transplanted into his dying brother's body and was not rejected because it did not appear foreign to his body.