Rosalyn Sussman Yalow: March 15

Rosalyn Sussman Yalow was a medical physicist who was awarded the 1977 Nobel Prize in Physiology or Medicine for her role in development of the radioimmunoassay (RIA). RIA is a radioisotope tracing technique that allows the measurement of tiny quantities of various biological substances in human blood as well as a multitude of other aqueous fluids.