COVID-19 has increased our awareness of the spread of illnesses and how to prevent them. However, we still live in a time when so many falsehoods about vaccines are spread, and young readers need a health guide like this one to truly understand the importance of vaccines to individual as well as global health. The manageable text introduces readers to the concept of vaccines, how they are made, and how they help us stay well. Colorful illustrations and graphic organizers help readers come to a greater understanding of vaccines and how to be virus warriors.