
Chronic Obstructive Pulmonary Disease(COPD) – A Group of Pathological Conditions in Which There Is Complete or Partial Obstruction to The Airway at Any Level from Trachea to The Smallest Airway Resulting in Functional Disability of the Lungs. Chronic Obstructive Pulmonary Disease, Is A Progressive Disease That Makes It Hard to Breathe. “Progressive” Means The Disease Gets Worse Over Time.