This book is part of the popular and engaging "You Wouldn't Want to Live Without..." series, offering a humorous and informative look at vital scientific advancements. Written by Anne Rooney, this volume focuses on the history and crucial importance of vaccinations. Presented with the series’ signature blend of playful text and detailed, often slightly gross, illustrations, it details the horrors of diseases like smallpox and polio before vaccines existed. The book explains the science behind how vaccines work—training the immune system—and emphasizes how they have saved billions of lives, ultimately concluding that living without them is a dangerous proposition.