character: Dr. Edward Jenner
topic: Discovery of the smallpox vaccine
grade: 9
subject: Biology
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character: Louis Pasteur
topic: Development of vaccines and germ theory
grade: 9
subject: Biology
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character: Jonas Salk
topic: Polio vaccine development
grade: 9
subject: Biology
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character: Robert Koch
topic: Bacteriology and Koch's postulates
grade: 9
subject: Biology
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