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The tallest man ever known was Robert Wadlow, an American, who reached the height of 8 feet 11 inches. He died at age 26 years from an infection caused by the immense weight of his body (491 pounds) and the stress on his leg bones and muscles.
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The average older adult in the United States takes five prescription drugs per day. Half of these drugs contain a sedative. Alcohol should therefore be avoided by most senior citizens because of the dangerous interactions between alcohol and sedatives.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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The horizontal fraction bar was introduced by the Arabs.