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Cyanide works by making the human body unable to use oxygen.
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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.