Types and stages of COPD: Symptoms, causes, and more

cop4dIn addition to staging your lung function, your doctor may also classify your COPD by group. Your group is determined by the severity of your COPD symptoms, the number of COPDWhat causes COPD? Damage to your lungs from smoking is the most common cause of COPD. Other causes include: Alpha-1 antitrypsin deficiency (alpha-1), a genetic