Quick Answer
Acute Bronchitis (Short-term): YES. It is usually caused by viruses (flu, cold) and is contagious as long as you have symptoms.
Chronic Bronchitis (Long-term): NO. It is usually caused by long-term irritation (like smoking) and is not contagious.
How Long Am I Contagious?
Viral Bronchitis
You are contagious for a few days to a week, usually while you have symptoms like fever, runny nose, or body aches.
Bacterial Bronchitis
If caused by bacteria (rare), you are usually contagious until 24 hours after starting antibiotics.
Common Symptoms
- • Persistent Cough: Can be dry or produce mucus (yellow/green).
- • Fatigue: Feeling tired or worn out.
- • Shortness of Breath: Mild wheezing or difficulty breathing.
- • Fever & Chills: Usually mild.
- • Chest Discomfort: Soreness from coughing.
When to See a Doctor
Seek Medical Care If:
- • Fever higher than 100.4°F (38°C) that lasts more than 3 days.
- • Cough lasts more than 3 weeks.
- • You cough up blood or rusty-colored mucus.
- • You have trouble breathing or wheezing.
- • You have repeated bouts of bronchitis.
Medical Review
Reviewed by: Ricardo Hamilton, MD
Last Updated: December 15, 2025
Sources: Mayo Clinic, American Lung Association, CDC