Rosalyn Yalow

Medical Physicist

Rosalyn Susan Yalow was a Nobel Prize winning medical physicist who developed, alongside colleagues Roger Guillemin and Andrew Shally, the Radioimmunoassay (RIA) test from radioisotopes and immunological techniques. A sensitive test which can measure minute amounts of hormones, enzymes, and protein, and it is now a basic tool that has advanced medical and biological research. At the time, Yalow was only the second American woman to win the Nobel Prize in Physiology or Medicine.

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