This book reveals the fascinating history of vaccines, from when they were first invented to the latest innovations, as well as the changes they've created in people's lives. The book also includes a table of contents, fun facts, a That's Amazing special feature, quiz questions, a glossary, additional resources, and an index. This Focus Readers title is at the Beacon level, aligned to reading levels of grades 2-3 and interest levels of grades 3-5.