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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.

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Approximately 500,000 babies are born each year in the United States to teenage mothers.

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There are more sensory neurons in the tongue than in any other part of the body.

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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.

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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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