Lung conditions - chronic obstructive pulmonary disease (COPD)

cop4dChronic obstructive pulmonary disease (COPD) is a progressive lung disease. Learn about the stages of COPD, their symptoms, and how to manage the disease here.The main types of COPD are emphysema and chronic bronchitis. They differ in the damage they do to the airways and lungs. However, the causes, symptoms, and treatment of