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The longest a person has survived after a heart transplant is 24 years.
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The average office desk has 400 times more bacteria on it than a toilet.
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.