Asthma is a chronic disease that affects the airways (tubes) that carry air in and out of the lungs. The disease causes the airways to be sensitive to certain exposures (this varies from person to person) such as allergens, pollutants, and infections. Common symptoms can include: wheezing, coughing, chest tightness, and trouble breathing. Most patients with asthma can control their symptoms so that they do not need to alter most daily activities.
Severe asthma affects 10-15% of asthma patients. It can develop in childhood and later in life. Patients with this form of asthma often don’t respond well to available treatment options and have their lives dramatically impacted by their disease.