Podcast-artAllergies are a major cause of illness in the United States, affecting as many as 50 million people—about one in five. Most do not know exactly what causes their symptoms or how to treat them effectively.  In this edition of Ask the Allergist, Dr. Stanley Fineman, 2012 president of the American College of Allergy, Asthma & Immunology talks about how allergy testing and immunotherapy can help.