The prevention of chronic bronchitis.
D000328:Adult; D000367:Age Factors; D001991:Bronchitis / Q000517:prevention & control*; D002648:Child; D002675:Child, Preschool; D002908:Chronic Disease; D006801:Humans; D007223:Infant; D012137:Respiratory System / Q000503:physiopathology; D012907:Smoking / Q000503:physiopathology; D009626:Terminology as Topic