What IS a virus? How do viruses spread? Why should everyone keep washing their hands? How does a vaccine work? And what can we do to STAY WELL? All these questions and more are answered in a friendly and helpful way, with quirky illustrations and lots of flaps to lift.

What is a virus? -- How do viruses spread? -- Why should I wash my hands? -- What's a vaccine? -- Which is the worst? -- How can we fight viruses?.