The viral infection produces bronchial inflammation which sets the stage for bronchitis and secondary bacterial infection.
Chronic bronchitis is a long-term condition of excessive bronchial mucus with a productive cough .
Chronic bronchitis is also known as chronic obstructive pulmonary disease . Factors that make it worse include air pollution, infection, familial factors, and allergies . The severity of the disease relates to the amount and duration of smoking . The incidence is 2 out of 100 people. Smoking and all other respiratory irritants should be avoided.