With the exception of a rare genetic defect,the only established cause of clinically significant COPD is cigarette smoking.

Question

Quizplus · Accepted Answer

This statement is true. While there are some rare genetic conditions that can contribute to the development of COPD, the overwhelming majority of cases are caused by smoking. Other factors such as air pollution, occupational exposures, and respiratory infections can also play a role, but smoking is the primary cause.

With the Exception of a Rare Genetic Defect,the Only Established