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Thyroid conditions may make getting pregnant impossible.
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Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.
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After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.
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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.