Allergic diseases have dramatically increased in prevalence in recent decades. However, while the genetic basis and the mechanisms of the allergic reaction are becoming ever clearer to researchers, there is still a tremendous gap between research results and actual practice in many allergists` offices.This volume provides much-needed help. This volume collects a series of excellent papers presented by members of the Collegium Internationale Allergologicum covering topics such as gene-environment interaction, T cell regulation, basic mechanisms of effector cell function, mast cells, psychoneuroallergology, asthma, food allergy, eczema, drug reactions, diagnostics and the latest progress in pharmacotherapy, as well as nonspecific and specific immunotherapy.