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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
In 1844, Charles Goodyear obtained the first patent for a rubber condom.
Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
There are more bacteria in your mouth than there are people in the world.
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