Centers for Disease Control and Prevention – Chronic obstructive pulmonary disease, or COPD, refers to a group of diseases that cause airflow blockage and breathing-related problems. It includes emphysema and chronic bronchitis. COPD makes breathing difficult for the 16 million Americans who have this disease. Millions more people suffer from COPD, but have not been diagnosed and are not being treated. Although there is no cure for COPD, it can be treated.

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