Vaccines prevent between 2.5 and 4 million deaths every year.
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About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.
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Approximately 500,000 babies are born each year in the United States to teenage mothers.
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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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All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.