The present book contains concise information on major disease management through applied poultry vaccination and also practical knowledge in the field. The book is immensely helpful in understanding the formulation of vaccination schedules for broilers, layers and breeders. The present book not only covers the preventive aspects of diseases but also contains the detailed information on theoretical and applied practical aspects of poultry immunology and vaccination. Language of the book is simple, presentation is lucid and unambiguous for easy understanding. This book will definitely play a critical role in imparting knowledge in poultry egg and poultry meat industry in terms of disease free maximum/optimum production of good quality eggs and meat from poultry for human consumption. It is hoped that the book is quite useful for students, teachers and researchers of Poultry and Veterinary Science. This book is also a valuable reference source for poultry disease investigator, practicing veterinarian and poultry inspector.