character: Immune System Defender
topic: How Cells Recognize and Respond to Viral Infections
grade: 9
subject: Science
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character: Virus Invader
topic: Mechanisms of Viral Entry and Invasion
grade: 9
subject: Science
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character: Helper T Cell
topic: Activation and Role in Immune Response
grade: 9
subject: Science
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character: Antibody Factory
topic: Production of Antibodies Against Pathogens
grade: 9
subject: Science
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