This English language edition is far more than a simple translation of the work "L'Histoire des vaccinations" published in 2008. The French edition has actually been totally revised and improved. In particular, it features a chapter dedicated entirely to yellow fever. A greater number of illustrations are included. This book will undoubtedly be of great interest to a section of the general public and to specialists. The history of vaccinations is a significant phase in the history of humanity. With the development of hygiene, vaccinations have certainly been the most notable progress of medicine. Nevertheless, this subject which has revolutionised human and animal medicine has long been explored poorly or not at all. This oversight has now been addressed through this fascinating work. All translated Pasteur texts are from the original manuscripts found in his laboratory notebooks. Finally, the moral problems inherent in the use of vaccines are addressed and at times, appear strangely similar to current situations. . .