How to spot a food allergy – new guidelines make it clearer for doctors

More and more people seem to be suffering from food allergies, but it's unclear why. Until now, there has been no standard for doctors to diagnose them.

This week, the National Institute for Allergy and Infectious Diseases issued the first-ever clinical guidelines for diagnosing and treating food allergies.

American Morning's Kiran Chetry speaks with Dr. Hugh Sampson, one of the authors of the new guidelines and the director of the Jaffe Food Allergy Institute at Mount Sinai Medical Center in New York.