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There are approximately 3 million unintended pregnancies in the United States each year.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
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Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.
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About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.