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Vaccines prevent between 2.5 and 4 million deaths 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.
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The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.
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There are 20 feet of blood vessels in each square inch of human skin.
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Your chance of developing a kidney stone is 1 in 10. In recent years, approximately 3.7 million people in the United States were diagnosed with a kidney disease.