Picture of Bronchitis
Acute bronchitis is an infection of the bronchial tubes, the large airways of the lungs, that are necessary for respiration. When the airways are inflamed, they produce phlegm and mucus. Symptoms of acute bronchitis may include cough, fever, shortness of breath, wheezing, sore throat, and chills. Acute bronchitis is usually caused by a virus, although sometimes a bacterial infection may be the cause.
Text Reference: "Acute Bronchitis." American Academy of Family Physicians.