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Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.
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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
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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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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.