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Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
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The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.