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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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The human body produces and destroys 15 million blood cells every second.
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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.