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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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Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.
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Asthma cases in Americans are about 75% higher today than they were in 1980.
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Illicit drug use costs the United States approximately $181 billion every year.
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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").