At this congress there were again numereous reports of progress in immunology. The new technologies are continuing to have an immense impact: gene isolation, mutation, transfection and expression, protein structure andpeptide synthesis, cell cloning, hybridization and monoclonal antibodies, CD serology, SCID and transgenic mice, modern immunomodulation and vaccines. A trmendous mass of data has accumulated over the last years. The reports are up-to-date and outstanding,to a degree no journal will ever achieve, and the results are presented in a concise and lucid way. This report will serve as a guideline for the years to came, because it is a treasure trove of explorations, making it exciting reading. This progress presents outstanding contributions. Immunology is exhibited at its best: an exciting research area and a rewarding subject to study for the benefit of mankind - today more than ever. Contents: B and T Cell Ontogeny, Repertoire, Selection and Tolerance.- Genetics, Structure, Function and Evolution of Immunoglobulins and T Cell Receptors.- MHC, Molecular and Cellular Aspects of Antigen Processing and Presentation.- Signal Transduction Pathways.- Functional T Cell Subsets.- Cell Adhesion and Interaction Molecules.- Cytokines and Cytokine Receptors in Health and Disease.- Molecular and Cellular Characteristics of Allergic Reactions.- Fc Receptors and Ig Binding Factors.- Complement System; Structure and Function.- Primary Immunodeficiencies.- Autoimmunity.- Therapeutic Application of Regulatory Networks.- Immunology of Infectious Diseases and Vaccination.- Transplantation Immunology.- Reproductive Immunology.- Tumor Immunology.- Subject Index.