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Asthma occurs in one in 11 children and in one in 12 adults. African Americans and Latinos have a higher risk for developing asthma than other groups.
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The longest a person has survived after a heart transplant is 24 years.
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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There are 20 feet of blood vessels in each square inch of human skin.
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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.