Ask Roddy, Vol. 2: Why do you need vaccines?

Roddy Rodent is a mouse that works with a group of pediatricians and scientists to understand why children get sick and to find cures to make them healthy again. In the "Ask Roddy" series, using simplified but accurately medical language children will understand how their bodies work, how to fight diseases and stay healthy. These books will help children understand the science behind common diseases, cope with their symptoms and stay healthy. In volume 2 children will learn why they need vaccines to help them fight diseases.