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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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The familiar sounds of your heart are made by the heart's valves as they open and close.
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The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.
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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.