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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.
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According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.
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The horizontal fraction bar was introduced by the Arabs.