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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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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
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Elderly adults are living longer, and causes of death are shifting. At the same time, autopsy rates are at or near their lowest in history.
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Everyone has one nostril that is larger than the other.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.