Emphysema is a long-term (chronic), irreversible lung disease that
occurs when the tiny air sacs in the lungs are damaged, usually as a result of
long-term smoking. It causes difficulty breathing and shortness of breath that
gets worse over time.
Emphysema is a form of chronic obstructive pulmonary disease
A rare type of emphysema is caused by the lack of a substance in
the lungs called alpha1-antitrypsin. This type of emphysema is usually
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