character: Clinical Trials Team
topic: Testing vaccine efficacy and safety
grade: 9
subject: Science
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character: Dr. Sarah Johnson
topic: Role of epidemiologists in vaccine development
grade: 9
subject: Science
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character: Dr. Mike Thompson
topic: Ethics in clinical trials
grade: 9
subject: Science
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character: Research Scientist
topic: Understanding vaccine mechanisms and immune response
grade: 9
subject: Science
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