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Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
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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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The average adult has about 21 square feet of skin.
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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
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Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.