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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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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.
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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.