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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
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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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Medications that are definitely not safe to take when breastfeeding include radioactive drugs, antimetabolites, some cancer (chemotherapy) agents, bromocriptine, ergotamine, methotrexate, and cyclosporine.
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.