Chronic obstructive pulmonary disease (COPD) includes two conditions—emphysema and chronic bronchitis—that make it harder to breathe. At least 12 million U.S. adults have the disease. It’s estimated that another 12 million people may have COPD but don’t know it.
Answer: True. COPD is a progressive disease, which means it gets worse over time. Smoking is the most common cause of COPD. Chronic bronchitis and emphysema are the two main conditions of COPD in the United States. In fact, most people who have COPD have both conditions.