cop4dChronic obstructive pulmonary disease (COPD) is where air cannot get out of the lungs easily (the airflow is obstructed). COPD is a common condition that mainly affects middle-aged or olderChronic obstructive pulmonary disease (COPD) is an umbrella term for a number of lung diseases that prevent proper breathing. Three of the most common COPD conditions are emphysema,