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Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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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 more sensory neurons in the tongue than in any other part of the body.
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Excessive alcohol use costs the country approximately $235 billion every year.