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Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.

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Human kidneys will clean about 1 million gallons of blood in an average lifetime.

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The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.

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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 more sensory neurons in the tongue than in any other part of the body.

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