Asthma Support Group
Asthma is a disease of the human respiratory system where the airways narrow, often in response to a "trigger" such as exposure to an allergen, cold air, exercise, or emotional stress. This airway narrowing causes symptoms such as wheezing, shortness of breath, chest tightness, and coughing, which respond to bronchodilators.
The only other purpose for this labeling issue is denial of coverage by insurance companies. For example, many 9/11 workers were labeled as having "reactive airway disease" - at which time this term really started coming into vogue in the popular vernacular beyond acemdic medical circles - as opposed to asthma giving companies an opportunity to deny coverage, especially as concerns certain expensive prescription items.
In reality, it makes no difference in terms of the disease progression or treatment. A horse is a horse of course, of course...