character: Dr. Edward Jenner
topic: Discovery of the smallpox vaccine
grade: 9
subject: Biology
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character: Louis Pasteur
topic: Further advancements in vaccination
grade: 9
subject: Biology
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character: Jonas Salk
topic: Development of the polio vaccine
grade: 9
subject: Biology
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character: Robert Koch
topic: Germ theory and public health initiatives
grade: 9
subject: Biology
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