Veterinary medicine is the branch of medicine which focuses on the treatment of disease, injury and disorder in animals. It is also concerned with the diagnosis and prevention of these ailments. Veterinary science benefits human health by monitoring and controlling infectious diseases which can be transmitted from animals to humans. One of the approaches through which this is accomplished is through vaccination. Veterinary vaccines seek to improve the health and welfare of companion animals and prevent animal-to-human transmission for both domestic and wild animals. There are different approaches to the development of veterinary vaccines such as molecularly defined subunit vaccines, whole pathogen preparations, genetically engineered organisms, and naked DNA injections. The various advancements in veterinary vaccines are glanced at and their applications as well as ramifications are looked at in detail in this book. It is meant for students who are looking for an elaborate reference text on vaccines in veterinary medicine.