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

cop4dChronic obstructive pulmonary disease (COPD) is estimated to affect 32 million persons in the United States and is the third leading cause of death in this country. Patients typically haveCOPD is a group of progressive lung diseases that includes emphysema and chronic bronchitis. Despite affecting an estimated 32 million people in the United States, as many as