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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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Vaccines prevent between 2.5 and 4 million deaths every year.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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There are 20 feet of blood vessels in each square inch of human skin.
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Computer programs are available that crosscheck a new drug's possible trade name with all other trade names currently available. These programs detect dangerous similarities between names and alert the manufacturer of the drug.