character: Vaccine Guru
topic: Vaccine Development and Efficacy
grade: 10
subject: Biology
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character: Immunologist
topic: Basic Principles of Immunological Memory
grade: 10
subject: Biology
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character: Dr. Immune
topic: How Vaccines Train the Immune System
grade: 10
subject: Biology
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character: Bio Tutor
topic: Cellular Mechanisms of Immunological Memory
grade: 10
subject: Biology
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