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A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
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Everyone has one nostril that is larger than the other.
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There are approximately 3 million unintended pregnancies in the United States each year.
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Approximately 500,000 babies are born each year in the United States to teenage mothers.