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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
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Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.
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The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).
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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.