The major histocompatibility complex (MHC) genes are involved in the immune system's response to tumor and infected cells and in generating an immune response. This book brings together basic aspects of the regulation of MHC antigens with important clinical applications (in viral infection, viral oncology, cancer biology and autoimmunity). There is a strong emphasis on situations where MHC expression is modulated (either stimulated or repressed). The book's major themes are: the mechanisms of MHC expression--explored at several levels including the transcription and translation of MHC genes...