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About Asthma
Asthma is a common disease that affects more than 22 million Americans, including 6.5 million children. It occurs when the linings of lung airways become inflamed and swollen and muscle spasms block airflow to the lungs. Although the exact cause of asthma is not known, many treatments are available to control the disease.
To see how asthma blocks airflow to the lungs, please click on the video below. |