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Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.
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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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Everyone has one nostril that is larger than the other.
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It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.