Immunology is a discipline of biology that deals with the study of immune system in organisms. Veterinary immunology is the domain of biomedical sciences that focuses on the study of all aspects of immune system in animals. It is involved in measuring, contextualizing and charting the physiological functions, malfunctions, and the physical, chemical and physiological characteristics of the components of the immune system. The key aspects of veterinary immunology focus on how the immune system functions, how diseases are prevented and why vaccines sometimes do not work and lead to adverse reactions. This book provides comprehensive insights into the field of veterinary immunology. It also presents researches and studies performed by experts across the globe. The extensive content of this book provides the readers with a thorough understanding of the subject.