Chronic Obstructive Pulmonary Disease

According to Wikipedia, 'Chronic bronchitis and emphysema are older terms used for different types of COPD. The term "chronic bronchitis" is still used to define a productive cough that is present for at least three months each year for two years. Those with such a cough are at a greater risk of developing COPD. The term "emphysema" is also used for the abnormal presence of air or other gas within tissues. Tobacco smoking is the most common cause of COPD ... '

© Haydn Thompson 2019