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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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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 bacteria in your mouth than there are people in the world.
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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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Asthma cases in Americans are about 75% higher today than they were in 1980.