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Q. Do Allergies Cause Asthma?

From Kathleen MacNaughton, R.N.,
Your Guide to Asthma.
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About.com Health's Disease and Condition content is reviewed by Sanja Jelic, MD
A. Experts are not sure what causes asthma, but they do know that people who have allergies are at much higher risk of developing asthma. The substances that trigger allergies are the same things that can trigger an asthma attack in certain people.
Updated: March 20, 2008
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