A viral infection of the lower airways that produces mucus, then resolves without damaging the airways is termed:

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Acute bronchitis is a viral infection of the lower airways that produces mucus but resolves without causing permanent damage to the airways. Emphysema is a chronic lung disease characterized by damage to the air sacs in the lungs, while pulmonary edema is the accumulation of fluid in the lungs, usually due to heart failure. Cystic fibrosis is a genetic disorder that affects the lungs, pancreas, and other organs, causing thick mucus buildup and damage to the organs.

A Viral Infection of the Lower Airways That Produces Mucus