2. Bronchitis - Symptoms, Diagnosis, Treatment of Bronchitis - NY Times Health Information
Bronchitis is an inflammation of the main air passages to the lungs. Bronchitis may be short-lived (acute) or chronic, meaning that it lasts a long time and often recurs.
health.nytimes.com

3. Bronchitis, Health Information, UW Health, University of Wisconsin Hospital, Madison
Bronchitis is inflammation of the main air passages to the lungs. Bronchitis may be short-lived (acute) or chronic, meaning that it lasts a long time and often recurs.
apps.uwhealth.org

4. OHSU Health Information: Acute Bronchitis in Children
Bronchitis is an inflammation of the large breathing tubes (airways) that are called bronchi, which causes increased production of mucus and other changes. Although there are several different types of bronchitis, the two most common are acute and...
www.ohsu.edu

5. Bronchitis definition - eMedicineHealth - experts in everyday emergencies, first aid and health information
Chronic bronchitis usually is defined clinically as a daily cough with production of sputum for 3 months, two years in a row. In chronic bronchitis, there is inflammation and swelling of the lining of the airways that lead to narrowing and obstruc...
www.emedicinehealth.com