Chronic obstructive pulmonary disease is a serious lung disease that affects the ability to breathe. In people with COPD, the airways inside the lungs are damaged and narrowed, causing problems with airflow in and out of the lungs. Common symptoms of COPD include shortness of breath, wheezing, and coughing. Two types of COPD are chronic bronchitis and emphysema. Asthma is another type of obstructive lung disease that has some overlap with COPD, but unlike asthma, lung changes that happen in COPD are not reversible. The most common cause of COPD is smoking, and the best way to prevent COPD in people who smoke is to stop smoking. The April 5, 2016, issue of JAMA contains the updated USPSTF recommendations about screening for COPD.