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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.
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Excessive alcohol use costs the country approximately $235 billion every year.
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If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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Medication errors are more common among seriously ill patients than with those with minor conditions.