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Did you know?
Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.
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There are 60,000 miles of blood vessels in every adult human.
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There are more sensory neurons in the tongue than in any other part of the body.