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Approximately 500,000 babies are born each year in the United States to teenage mothers.
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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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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.
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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.