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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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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.
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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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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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Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.