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Did you know?
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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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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Approximately 500,000 babies are born each year in the United States to teenage mothers.
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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
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Vaccines prevent between 2.5 and 4 million deaths every year.