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Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
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About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.
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Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
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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.