Chronic Obstructive Pulmonary Disease
Chronic obstructive pulmonary disease (COPD) is a group of lung conditions that block airflow from the lungs. The main symptoms of COPD are shortness of breath and chronic cough with mucus. A healthy person can breathe out about 4 to 6 liters of air per second. A person with COPD will breathe out about 1 … Read more