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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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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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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.