Image:Asthma before-after.png

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During an asthma episode, inflamed airways react to environmental triggers such as smoke, dust, or pollen. The airways narrow and produce excess mucus, making it difficult to breathe.


Image from a FDA newsletter: http://www.fda.gov/fdac/features/2003/203_asthma.html


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Unless otherwise noted, the contents of the Food and Drug Administration website (www.fda.gov) --both text and graphics-- are public domain. [1] (August 18, 2005)


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