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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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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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By definition, when a medication is administered intravenously, its bioavailability is 100%.
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The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.
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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.


