Is Bronchitis Contagious? Understanding How It Spreads

If you or someone around you has bronchitis, you may wonder: is bronchitis contagious? The answer depends on the type. Acute bronchitis caused by a virus or bacteria can spread to others. Chronic bronchitis, caused by long-term irritants like smoking, cannot spread from person to person.

What Is Bronchitis?

Bronchitis is inflammation of the bronchial tubes, the airways that carry air to your lungs. When these tubes get inflamed, they fill with mucus and cause a nagging cough. You may also have chest discomfort, fatigue, and mild body aches.

Is Acute Bronchitis Contagious?

Yes, acute bronchitis is contagious when caused by a virus or bacteria. This type usually develops from a cold or flu and is the most common form. The same viruses that cause colds can lead to acute bronchitis.

You can spread acute bronchitis through respiratory droplets when you cough or sneeze. The virus can also spread by touching contaminated surfaces and then touching your face. Most people are contagious for a few days to about a week.

Is Chronic Bronchitis Contagious?

No, chronic bronchitis is not contagious. This type is caused by long-term exposure to irritants like cigarette smoke, air pollution, or dust. It is not caused by an infection, so it cannot spread to others. Chronic bronchitis is a form of chronic obstructive pulmonary disease (COPD).

How Long Is Bronchitis Contagious?

With viral bronchitis, you can spread the infection for a few days up to one week. You may also be contagious for a day or two before symptoms appear. Bacterial bronchitis usually stops being contagious 24 hours after starting antibiotics.

How to Prevent Spreading Bronchitis

If you have acute bronchitis, cover your mouth and nose when you cough or sneeze. Wash your hands often with soap and water. Avoid close contact with others, especially young children, older adults, and people with weakened immune systems.

When to See a Doctor

Most cases of acute bronchitis get better on their own within two weeks. See a doctor if your cough lasts more than three weeks, you have a high fever, you cough up blood, or you have trouble breathing. These may be signs of a more serious condition.