Dr. Rachelefsky is director of the Executive Care Center for Asthma, Allergy, and Respiratory Diseases, a professor of allergy and immunology, and an associate director of the Allergy-Immunology Training Program at the David Geffen School of Medicine at UCLA.  He knows pretty much everything there is to know about allergies and asthma, and he's really good at explaining the latest studies, trends, new treatments, and potential breakthroughs in his field.  Dr. Rachelefsky treats both children and adults.