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The top five reasons that children stay home from school are as follows: colds, stomach flu (gastroenteritis), ear infection (otitis media), pink eye (conjunctivitis), and sore throat.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.