I'm on an antibiotic for bronchitis. How long will I still be considered contagious?
Yes. Acute bronchitis is often caused by a virus and, thus, is contagious much like the common cold is contagious (the common cold is also caused by a virus).
Chronic bronchitis, on the other hand, is not contagious.Smoking is the main cause of chronic bronchitis. The more a person smokes, the more likely it becomes that the person will get bronchitis and that the bronchitis will be severe.
Secondhand smoke may also cause chronic bronchitis. Air pollution, infection, and allergies make chronic bronchitis worse.