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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).
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The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.
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Vaccines prevent between 2.5 and 4 million deaths every year.