MRI (Magnetic Resonance Imaging) - Raymond Damadian.

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Human Genome Project - International research effort.

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Smallpox Eradication - Global collaborative effort.

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Polio Vaccine - Jonas Salk and Albert Sabin.

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Sulfa Drugs - Gerhard Domagk.

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Discovery of Vitamins - Various scientists, including Casimir Funk.

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Electrocardiogram (ECG) - Willem Einthoven.

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Structure of the Nervous System - Santiago Ramón y Cajal.

Insulin - Frederick Banting and Charles Best.

DNA Double Helix - James Watson and Francis Crick.