This book explores the cellular and molecular mechanisms involved in asthma and allergic diseases, from basic immunology to the treatment of patients. Arising from a special symposium held to celebrate Professor A. Barry Kay's 20th anniversary as Head of the Department of Allergy and Clinical Immunology at the National Heart and Lung Institute, London, the publication presents 18 review articles by an impressive cross section of experts in the field. The topics considered include Th1 and Th2 cells, the regulation of Th2 cytokine transcription, the role of T cells in the immunopathogenesis of asthma, and MHC-restricted IgE-independent T-cell-induced late-phase responses in human subjects. Further chapters focus on eosinophil adhesion and activation, the role of C-C chemokines in the recruitment of eosinophils, and the interactions between eosinophils and fibroblasts. T-cell recruitment and T-cell interactions in cutaneous basophil hypersensitivity and fibrotic lung disease are discussed.