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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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There are 20 feet of blood vessels in each square inch of human skin.
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Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.
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Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
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Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.