Izzy and Iggy are on holiday with their parents, but the trip hits a bump when an innocent encounter with a flower ends with Izzy falling ill. As she grapples with her symptoms, Iggy has a brilliant idea — they can ask Immo the Immunity Guardian for help!Magically, Immo appears and together, they embark on yet another adventure to learn about the immune system and how it can get a bit overprotective.Explore the immune system in this fascinating series written by scientists! Discover how Immunity Guardians help us cope with stress, allergies and illness, and be enthralled by the wonders occurring inside our very own bodies.WHAT'S INSIDE: Astonishing facts about the immune system;Learn all about the effects of stress on our health;Written by scientists;