What are the 4 stages of COPD, Mild, Moderate, Severe, and Very Severe manifest itself in the form of lung injury and increasing severity of symptoms. Individuals with the illness may face more frequent flare-ups and problems breathing. These stages are important to understand because they aid in determining the impact standard of living COPD on a person's and highly personalized eva... https://www.uniccm.com/course/cpd-what-are-the-4-stages-of-copd