This book is designed to provide easy-to-read and basic information about vaccines for those undertaking a vaccine course or for medical providers seeking to improve their skills. Written by expert medical educators in the areas of infectious diseases, medical microbiology, and pediatrics, this book begins by establishing the fundamentals of vaccines such as what constitutes a vaccine, how they are manufactured and composed, how they are tested for safety and efficacy, and how vaccine recommendations are developed and conveyed to health care providers and their patients. The book then explains the composition, safety profile, effectiveness, and current recommendations for use of every available vaccine, alphabetized by infection. The concluding section illuminates practical concerns every vaccinating clinician experiences, including vaccine confidence and hesitancy, misconceptions, and patient communication.