character: Dr. Sarah Thompson
topic: Public Health and Vaccination Strategies
grade: 9
subject: Science
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character: Dr. Michael Lee
topic: Historical Impact of Vaccination on Disease Eradication
grade: 9
subject: Science
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character: Dr. Emily Chang
topic: Vaccination and Herd Immunity Explained
grade: 9
subject: Science
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character: Dr. James Patel
topic: Current Trends in Vaccine Development and Disease Prevention
grade: 9
subject: Science
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