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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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The average adult has about 21 square feet of skin.
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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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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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Blood is approximately twice as thick as water because of the cells and other components found in it.