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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).
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Excessive alcohol use costs the country approximately $235 billion every year.
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The longest a person has survived after a heart transplant is 24 years.