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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.
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More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.
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Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.