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Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.
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Computer programs are available that crosscheck a new drug's possible trade name with all other trade names currently available. These programs detect dangerous similarities between names and alert the manufacturer of the drug.
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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.
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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
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Vaccines prevent between 2.5 and 4 million deaths every year.