Asthma and Allergy Foundation of America – Educational Materials and Tools for Patients
American Academy of Allergy Asthma & Immunology – If you have asthma your airways are always inflamed.
Chronic Obstructive Pulmonary Disease
American Lung Association – COPD includes chronic bronchitis and emphysema.
Centers for Disease Control and Prevention – COPD refers to a group of disease that cause airflow blockage and breathing-related problems.