ELLEN CRAIN, MD: About 7 to 10% of children in the United States have asthma, and the rate of diagnosis of asthma has increased dramatically over t...

ANNOUNCER: An estimated 25 million Americans have asthma. Some of those people experience occasional shortness of breath. But asthma can be more se...

CHERYL: I've been dealing with asthma my entire life. I had allergies as a young child. ANNOUNCER: For Cheryl, asthma and allergies have always gon...