Immunology refers to the study of immune systems of all living organisms. It studies the physiological functions, immunological disorders and the chemical, physical and physiological characteristics of immune systems. This book is a valuable compilation of topics, ranging from the basic to the most complex theories and principles in this field. Different approaches, evaluations and methodologies and advanced studies on immunology have been included in it. The text aims to serve as a resource guide for students and experts alike and contribute to the growth of the discipline.