Sid is super excited because his Grandma is coming to school! Grandma is a nurse, so she'll be giving everyone the new flu vaccination. Sid and his friends are a little hesitant to get the shot, and they have lots of questions about the vaccination and what it does inside their bodies. Grandma and Susie team up to explain the science of how a vaccination works, and then Grandma kicks in with a special song that makes getting a vaccination super easy!