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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.
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It is important to read food labels and choose foods with low cholesterol and saturated trans fat. You should limit saturated fat to no higher than 6% of daily calories.
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According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.