Do You Know? Viruses and Bacteria Level 4

Do You Know? Viruses and Bacteria (Level 4) is an educational nonfiction children’s book in the Do You Know? series by Molly Oldfield. It explains what viruses and bacteria are, how they differ, and how they interact with humans, animals, and the environment. The book also covers how infections spread, how the immune system responds, and how science and medicine help prevent and treat disease. Aimed at more confident young readers, it combines clear explanations with scientific facts and illustrations to build understanding of microbiology, health, and disease in an accessible way.