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As of mid-2016, 18.2 million people were receiving advanced retroviral therapy (ART) worldwide. This represents between 43–50% of the 34–39.8 million people living with HIV.
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Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
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There are 20 feet of blood vessels in each square inch of human skin.
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The longest a person has survived after a heart transplant is 24 years.
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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.