Chronic Obstructive Pulmonary Disease (COPD) is a general name given to a group of advanced lung diseases.
Diseases that fall under this group are:
- Chronic Bronchitis
- Adult Refractory Asthma (not fully reversible)
- Severe Bronchiectasis
These diseases have many things in common. They have many of the same signs and symptoms. They also have many of the same treatments and tests. Shortness of breath occurs in more advanced stages of disease. COPD may exist for years without noticable shortness of breath.
Source: COPD Foundation