Bronchitis is a medical condition characterized by coughing and mucus caused by inflammation of the mucous membranes of the bronchi, the tubes that carry air from the trachea to the lungs. Bronchitis generally takes one of two forms: acute bronchitis or chronic bronchitis. Acute bronchitis refers to inflammation that causes coughing and mucus and lasts for several days to weeks. Chronic bronchitis is more serious and refers to persistent coughing and mucus that lasts for at least three months per year for two consecutive years.

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