Some vaccines may be controversial today, but undoubtedly they have saved millions of lives since their introduction. Mass inoculations began with the polio vaccine in 1952 and since then have become a part of modern life. This important volume makes vaccine technology understandable, describing the different types, how they're administered, and their side effects and limitations. Readers will feel well-informed as they come to comprehend key topics such as herd immunity, the anti-vaccination movement, and new developments in vaccine technology, including the diseases they may treat in the future and how they're delivered.