Karl Landsteiner is best known for his discovery of the human blood goups. The revolutionary discoveries of this brilliant scientist in other fields have not received the recognition they deserve. His demonstration that poliomyelitis is transmissable showed the way of modern virology. His studies opening the field for epitope recognition, which he himself considered his main achievement, laid the foundation for research ongoing in our days. This book with its outstanding contributors is but a small tribute to this visionary scientist.

This is the fourth of a series of Symposia in Immunology which were organized to bring important new information on the expanding field of immunology to practicing physicians interested in the field. Highly renowned basic scientists share their results with physicians conducting clinical research and those experienced in the treatment of the respective diseases. This series of symposia is planned to cover different areas of immunology and will help to close the gap between special achievements of scientists and practicing physicians.

This is the sixth symposium in a series on immunology organized by IMMUNO, covering tumour immunology. This volume deals with T-cell recogntion and CD95-associating signalling, clinical investigations, cells, costimulatory signals and therapeutic approaches, cytokines and vaccines.