Lung development may explain why some non-smokers get COPD and some heavy smokers do not

Chronic obstructive pulmonary disease (COPD), a debilitating lung condition, often develops as a result of smoking, but researchers have long puzzled over why nearly a third of cases occur in people who never smoked.
According to a new study, people with small airways relative to the size of their lungs may have a lower breathing capacity and, consequently, an increased risk for COPD—even if they don´t smoke or have any other risk factors. The study, funded in part by the National Heart, Lung, and ...