A common (but misunderstood) disease.

Chronic obstructive pulmonary disease (COPD) is a serious condition of the airways that affects millions of Americans. But many people don't know much about it. In fact, almost half of COPD sufferers have never been diagnosed. To better understand COPD, read on to learn the truth.

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Medically Reviewed By: Williams, Robert, MD;

Last Annual Review Date: 6/27/2012 12:00:00 AM