Various Stages of Chronic Obstructive Pulmonary Disease( COPD ) STAGE 1 - Mild COPD STAGE 2 - Moderate COPD STAGE 3 - Severe COPD STAGE 4 - Very Severe COPD STAGE-1: Chronic Obstructive Pulmonary Disease ( COPD ) is a scourge in numerous parts of the world. Most patients with COPD exhibit gentle ailment. Mild COPD is the starting stage, the foundation of the administration of mellow infection is a smoking suspension, which is the main demonstrated intercession to assuage indications, change its normal history and decrease mortality. STAGE-2: Numerous individuals erroneously trust these times of expanding shortness of breath, hack, or sputum creation are bronchitis , yet in actuality, they are likely cautioning signs that the condition is advancing. Direct or organize II COPD is the place most findings are made. STAGE-3: At this Stage, you will probably encounter noteworthy lung work weakness. Numerous patients will encounter an expansion in COPD flare-up...