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Did you know?
About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.
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There are approximately 3 million unintended pregnancies in the United States each year.
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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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There are more sensory neurons in the tongue than in any other part of the body.