character: Robert Koch
topic: Koch's Postulates and Bacterial Infections
grade: 9
subject: Science
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character: Louis Pasteur
topic: Contributions to Germ Theory
grade: 9
subject: Science
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character: Edward Jenner
topic: Vaccination and its Impact on Infectious Diseases
grade: 9
subject: Science
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character: Alexander Fleming
topic: Discovery of Penicillin and its Role in Treating Infections
grade: 9
subject: Science
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