character: B Cell Billy
topic: Antibody Production
grade: 9
subject: Science
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character: Immune System Sally
topic: Role of B Cells in Immunity
grade: 9
subject: Science
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character: Antibody Andy
topic: Types of Antibodies
grade: 9
subject: Science
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character: Helper T-cell Tom
topic: Activation of B Cells
grade: 9
subject: Science
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