Chronic Obstructive Pulmonary Disease (COPD)
Introduction Chronic Obstructive pulmonary disease also known as COPD is a group of diseases which make breathing difficult by obstructing airflow and causing other breathing related problems (Centers for Disease Control and Prevention [CDC], 2015). This disease which is described by the National Heart, Lung and Blood Institute (NHLBI) as progressive because it worsens over time includes chronic bronchitis, emphysema and asthma in some cases (CDC, 2013; NHLBI, 2013a). In developing countries, poor quality of indoor air is suspected to play a major role in the disease development and progression whereas in the Unites States, tobacco smoke is reported ...