Immune System

Immune System book cover — TABLE OF CONTENTS CHAPTER 1 Your Body’s Army 4 CHAPTER 2 Block and Attack 8 CHAPTER 3 Clean-Up Crew 16 ACTIVITIES TOOLS Try This 22 Glossary 23 Index 24 To Learn More 24

Immune System — page 1 — CHAPTER 1 YOUR BODY’S ARMY First you feel a sore throat Then you start sneezing Soon your whole head feels stuffed up You have a cold 4 CHAPTER 1

Immune System — page 2 — You feel bad But your stuffy head is a good thing It means your immune system is working It is fighting off the virus CHAPTER 1 5

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