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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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Women are 50% to 75% more likely than men to experience an adverse drug reaction.
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More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.
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There are approximately 3 million unintended pregnancies in the United States each year.
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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.