COPD

Chronic obstructive pulmonary disease (COPD) is the co-occurrence of chronic bronchitis and emphysema, a pair of commonly co-existing diseases of the lungs in which the airways become narrowed. This leads to a limitation of the flow of air to and from the lungs, causing shortness of breath (dyspnea). In contrast to asthma, this limitation is poorly reversible and usually gets progressively worse over time.

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