Bronchitis is inflammation of the bronchial tubes, or bronchi. It can be caused by virus, bacteria, smoking or the inhalation of chemical pollutants or dust. The most common viruses are influenza A and B.
Bronchitis is inflammation of the bronchial tubes, or bronchi. It can be caused by virus, bacteria, smoking or the inhalation of chemical pollutants or dust. The most common viruses are influenza A and B.