This book is a second attempt of a group of distinguished international authors to reveal out a number of disputable topics in regard to immunopathology, immunoregulation, immunosuppression, immunostimulation, immunotherapy, immune status, and clinical immunology as a whole.Generally speaking, immunopathology (IP) is a branch of medicine that deals with immune responses associated with disease. It has various manifestations, both clinically expressed and latent processes, which, however, are also a high risk to the potential patient. IP includes the study of the pathology of an organism, organ system, or disease with respect to the immune system, immunity, and immune responses.The main aim of the authors of the book is to take a deep look into serious immune disorders. The chapters reflect updated information of the current development and perspective of modern immunology in regard to immune diseases, and they tend to expand the present knowledge on the specific topics included in the content.Defects or malfunctions in the immune response can provoke illness or disease. Such disorders are generally caused by an overactive immune response, manifested as hypersensitivity reactions, an inappropriate reaction to self, manifested as autoimmunity, or ineffective immune responses, known as immunodeficiency.This book is a step forward to the positive discussion of proper diagnosis and appropriate therapeutic decisions, because Bene diagnoscitur, bene curator (meaning, a disease known is half cured).It is directed to all biomedical researchers and clinicians, from students to professionals, academic scientists, university professors, and specialists.We, the authors, editors, and technical supervisors of the InTech Open Access Publisher, are fully aware that our product, the new book Immunopathology and Immunomodulation could be a useful tool in the hands of everybody who is keen and ambitious to know more about immunology.