Asthma–chronic obstructive pulmonary disease (COPD) overlap syndrome (ACOS) is a commonly encountered yet loosely defined clinical entity. ACOS accounts for approximately 15–25% of the ...

You can have asthma along with COPD. This is called asthma-COPD overlap syndrome (ACOS). You may have COPD if you notice persistent, prolonged changes to your breathing. Symptoms can include ...