Continual obstructive pulmonary illness (COPD) is often a progressive condition characterised by a persistent airflow limitation and Serious systemic inflammation, due to considerable publicity to noxious particles and gases (one). COPD manifests in two clinical phenotypes: Continual bronchitis and emphysema.T?t nghi?p ??i h?c D??c Hà N?i, nhi?u n