Chronic respiratory diseases (CRDs) affect the airways and other structures of the lungs altering how one can breathe. Preventable CRDs include asthma and respiratory allergies, chronic obstructive pulmonary disease (COPD), occupational lung diseases, cancer, sleep apnoea and pulmonary hypertension.

The symptoms of COPD include breathlessness, abnormal amounts of mucus in the airways, and a chronic cough. Daily activities—such as walking or exercising—can become very difficult as the condition gradually worsens. The primary cause of COPD is tobacco smoke.