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Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.
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Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.
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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
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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 FDA recognizes 118 routes of administration.