EspañolCOPD affects millions of adults, but many people don’t know much about the disease until they or a loved one is diagnosed. Here are answers to common questions about what COPD is, who’s at risk and what actually helps.​What is COPD, and what symptoms of COPD appear first?COPD, or chronic obstructive pulmonary disease, is a common lung condition that narrows the airways and makes breathing harder over time. It includes chronic bronchitis and emphysema, both of which change the structure of the lungs. Common symptoms include a cough that brings up mucus (often worse in the morning), short...