This book talks about immunology in scientific and curative aspects. The book is rather precise and comprises of matters very relevant to the topic of human immune system and its role in health and diseases. Any act which weakens the efficiency of immune system is classified under Immunosuppression. Therapeutic immunosuppression has uses in scientific medicine, which vary from prevention and therapy of organ/bone marrow transplant rejection to organization of autoimmune and inflammatory disorders. This book brings forward significant growth in the area of molecular mechanisms and active therapeutic aspects used for immunosuppression in different human disease situations. This book combines all the important information from different parts of the world, which had been earlier dispersed in different biomedical literature. This text is highly useful to practitioners, doctors, surgeons and biomedical researchers, because it sheds light on different aspects of immunosuppression and regulation, thus analyzes recent advancements in this domain.