character: Robert Koch
topic: Germ Theory of Disease
grade: 9
subject: Biology
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character: Louis Pasteur
topic: Development of Vaccines
grade: 9
subject: Biology
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character: Joseph Lister
topic: Antiseptic Techniques
grade: 9
subject: Biology
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character: Ignaz Semmelweis
topic: Hand Hygiene in Medicine
grade: 9
subject: Biology
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