PATIENTS HAVE COMPLAINED FOR YEARS that colds make their asthma worse. Today researchers have documented that viral infections are associated with about 85 percent of asthma attacks in children and many in adults as well. In contrast, new research suggests that some viruses may actually protect children from developing asthma in the first place by changing the immune system's response so that IgE antibodies are not produced. Researchers are working to understand exactly what role respiratory infections play in asthma. treatments for individual patients.

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