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About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
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Asthma cases in Americans are about 75% higher today than they were in 1980.
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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.