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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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Coca-Cola originally used coca leaves and caffeine from the African kola nut. It was advertised as a therapeutic agent and "pickerupper." Eventually, its formulation was changed, and the coca leaves were removed because of the effects of regulation on cocaine-related products.
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The longest a person has survived after a heart transplant is 24 years.
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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
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The horizontal fraction bar was introduced by the Arabs.