Experts have known for some time that having allergies increases the risk for developing asthma. Now, new research provides more evidence for this link.

Research published by a division of the National Institutes of Health in the Journal of Allergy and Clinical Immunology reveals that:

• more than half of the current asthma cases in the US can be attributed to allergy
• 30 percent of those cases are due to cat allergy, one of the more potent forms of allergy to animal dander
• the study looked a skin...