Chronic Obstructive Pulmonary Disease - COPD Guidelines Chronic obstructive pulmonary disease (COPD) is a chronic inflammatory lung disease which is caused due to progressive lung diseases including emphysema, chronic bronchitis, refractory (non-reversible) asthma, and some forms of bronchiectasis. It blocks the airflow mainly and increases the shortness of breath. WHO estimated 3 million deaths in
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