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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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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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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.
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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.
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There are 20 feet of blood vessels in each square inch of human skin.