Chronic obstructive pulmonary disease (COPD), which includes chronic bronchitis and emphysema, is a long-term lung disease that makes it hard to breathe. The disease affects millions of Americans and is the third leading cause of disease-related death in the U.S. The good news is COPD is often preventable and treatable.
https://www.lung.org/lung-health-diseases/lung-disease-lookup/copd

