The branch of biology which deals with the study of immune systems in different organisms is known as immunology. The study of different aspects of immune systems in animals is known as veterinary immunology. It is a subfield of biomedical science, which is also related to veterinary science and zoology. The health and working of the immune systems in animals along with the malfunctions and disorders are some of the areas which are studied within this field. The processes through which vaccines prevent diseases as well as the adverse reactions which are sometimes caused by vaccines are also dealt within this field. This book provides comprehensive insights into the field of veterinary immunology. It presents researches and studies performed by experts across the globe. This textbook is appropriate for students seeking detailed information in this area as well as for experts.