Particularly useful for doctors' surgeries. Simple facts connected to a simple story line, emphasising how colds and bugs get passed from person to person. Tessa has the cold first and passes it on to Ali by giggling and talking in school. Abi's parents catch the bug, and on it goes. Bits of information about germs, the importance of hygiene and the different ways germs can affect people are added on to the story, and the lively, cartoon-style pictures show the graphic results!