| http://www.w3.org/ns/prov#value | - Health & Wellness > Adult Health LibraryChronic BronchitisWhat is chronic bronchitis?Chronic bronchitis means long-term inflammation of the bronchi, which results in increased production of mucus, as well as other changes.To be classified as chronic bronchitis:Cough and expectoration must occur most days for at least three months per year, for two years in a row.Other causes of symptoms, such as t
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