Discovery of Vitamin C and Scurvy - James Lind and Albert Szent-Györgyi.

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Discovery of Neurotransmitters - Otto Loewi and Henry Dale.

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Rubella Vaccine - Maurice Hilleman.

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Discovery of Antibiotics - Alexander Fleming, Selman Waksman, and others.

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Discovery of Stem Cells - Ernest McCulloch and James Till.

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Structure of Hemoglobin - Max Perutz.

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Discovery of Prions - Stanley Prusiner.

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Pap Smear - Georgios Papanikolaou.

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Cloning - Ian Wilmut and Dolly the Sheep.

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Heart-Lung Machine - John Gibbon.

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