When people talk about the dangers of smoking, chronic obstructive pulmonary disease (COPD) is one of the conditions they’re talking about. In fact, smoking is the most important cause of COPD. While COPD is a leading cause of death, people can take steps to control the condition. Here are 4 things individuals and caregivers should know about COPD: https://mrkmnls.co/46ySepm | Merck Manual Consumer