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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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Addicts to opiates often avoid treatment because they are afraid of withdrawal. Though unpleasant, with proper management, withdrawal is rarely fatal and passes relatively quickly.
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About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.
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There are 60,000 miles of blood vessels in every adult human.
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Approximately 500,000 babies are born each year in the United States to teenage mothers.