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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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Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
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Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.