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Did you know?
In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
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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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The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.
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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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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.