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In Newsweek Magazine

HEALTH: TRACKING TRIGGERS

How well are you warding off the wheezing? In a study published last week, University of Michigan researchers found that half the steps parents take to prevent a child's asthma attacks are ineffective or unproved. That's because asthma is provoked by a variety of triggers, each of which calls for a specific intervention. Special bedding makes sense if your child is allergic to dust mites, but not if the problem is plant pollen. Shut the windows instead.

Asthma triggers fall into four main categories: irritants (tobacco smoke, cleaners), allergens (pollen, dust mites, pet dander), viral infections and strenuous exercise. Start by identifying your child's trigger, says Michigan's Dr. Michael Cabana, then take effective action. If the trigger is cigarettes, quit smoking. (Do it for yourself, too.) If it's a cold, keep everybody's hands washed. For more tips, see the Asthma and Allergy Foundation of America (aafa.org).

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