When you get ill, part of your body stops working the way it should. If you have a stomach bug, your stomach stops working properly. It cannot do its normal job

"The world is full of tiny viruses and bacteria that can be seen only through a microscope. Some bacteria can be helpful, but others cause diseases such as typh

One of a series of titles dealing with basic scientific concepts aimed at reluctant readers aged 9-11.

"Introduces young readers to the world of good and bad bacteria: germs"--