character: Doc
topic: The Role of White Blood Cells in Fighting Infection
grade: 2
subject: Health
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character: Buddy
topic: How the Immune System Works
grade: 2
subject: Health
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character: Dr. Wise
topic: Understanding Germs and How to Fight Them
grade: 2
subject: Health
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character: Sally
topic: Healthy Habits for a Strong Immune System
grade: 2
subject: Health
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