1921–, American medical physicist, b. New York City, Ph.D. Univ. of Illinois, 1945. As a researcher at the Bronx Veterans Administration Hospital, Yalow and colleague Solomon A. Berson developed a process, called radioimmunoassay (RIA), that made it possible to detect mere traces of biological substances in blood and other fluids. For her work, Yalow was awarded the 1977 Nobel Prize in Physiology or Medicine along with Andrew V. Schally and Roger Guillemin.
