When dust is disturbed by HVAC systems or human ... asthma attacks, and chronic bronchitis. Long-term exposure is associated with reduced lung function, cardiac episodes, neurological disorders ...

This could be a virus, bacteria, or something you may be allergic to, like dust. Chronic (long-term) bronchitis is when you have symptoms for 3 months or longer. If symptoms are not severe ...

Here's what causes bronchitis, how the illness usually spreads and how you can treat symptoms if it affects you or a loved one.

This interactive map explains where COPD rates, hospitalizations, and deaths are highest across the United States.