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Did you know?
There are 20 feet of blood vessels in each square inch of human skin.
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Excessive alcohol use costs the country approximately $235 billion every year.
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Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.