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| • | Chronic Obstructive Pulmonary Disease (COPD)
Chronic obstructive pulmonary disease (COPD) refers to a group of disorders that damage the lungs and make breathing increasingly more difficult over time. | | • | Emphysema
Emphysema is a progressive respiratory disease in which millions of the lungs' tiny air sacs (alveoli) stretch out of shape or rupture. | | |
