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Blood is approximately twice as thick as water because of the cells and other components found in it.
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Medication errors are three times higher among children and infants than with adults.
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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In the ancient and medieval periods, dysentery killed about ? of all babies before they reach 12 months of age. The disease was transferred through contaminated drinking water, because there was no way to adequately dispose of sewage, which contaminated the water.