On World Asthma Day 2016, the National Institutes of Health reaffirms its commitment to support research to improve the lives of all people with asthma. NIH-funded research has advanced our understanding of asthma as a disease as well as the impact asthma has on the lives of those affected.  We have made great strides in learning how to treat and prevent asthma, and we are committed to ensuring that scientific discoveries move quickly into clinical practice to provide the best possible care for all people with asthma.

Asthma is a chronic disease that intermittently inflames and narrows the airways. People with asthma may experience wheezing, breathlessness, chest tightness and coughing when the airways narrow. Roughly 300 million people worldwide live with this condition, including approximately 24 million in the United States. In the United States, asthma is a major contributing factor to missed time from school and work, and is also a major cause of hospitalization and emergency department visits.