Immunology is the field of study concerned with the immune system, which is responsible for defending the body against various types of infections. When foreign substances enter the body, the immune system initiates a range of protective mechanisms. To fully grasp the subject of immunology, it is necessary to examine it in its entirety. This book provides a comprehensive and straightforward introduction to the fundamentals and emerging trends in immunology. The text is divided into 20 chapters, which cover all the important areas of immunology necessary for a thorough understanding of the subject. In addition to covering fundamental immunology concepts, the book also includes a dedicated section on Immunotechniques, which are commonly used in laboratories. The book also features a comprehensive glossary of important terms for quick reference.