In this text, the author has tried to unfold before the student, the essence of immunology from its historic beginnings, to the understanding of basic concepts of host defence and onto the many clinical applications of this science. Immunology: Introductory Textbook, covers the topics of Immunobiology, Immunoglobulins, Immuno-response Mechanisms, Transplantation Immunology and Immunodeficiency Diseases, Immunopotentiation and Immuno-suppression, among others. This text has been written for the undergraduate students of microbiology, immunology and nursing courses. The student of medicine will find that the pathogenesis of many disease processes are explained using an immunological basis. The book will also prove useful to students of the other life sciences courses who wish to explore this fascinating area of science. Table of Contents List of Abbreviations Milestones in Immunology Innate Immunity Immunobiology Antigens and Immunogenicity Immunoglobulins I : Structure and Function Immunoglobulins II: The Genetics of Antibody Diversity The Complement System Detection and Application of Antigen-Antibody Reactions Monoclonal Antibodies The Major Histocompatibility Complex Immune Response Mechanisms I: B and T Lymphocytes Immune Response Mechanisms II: Antigen Presentation and Processing; Mechanisms of Lymphocyte Activation Cytokines Cell-Mediated Immunity Hypersensitivity Immunologic Tolerance and Autoimmunity Immunopotentiation and Immunosuppression Transplantation Immunology Tumour Immunology Immunity Against Infectious Diseases Immunization Immunodeficiency Diseases Immunology of HIV Infection Immunity and Malnutrition