Yalow was a medical physicist who developed the technique of radioimmunoassay (RIA)—a simple way to measure tiny concentrations of substances such as hormones, enzymes, or drugs in blood or other bodily fluids. She originally applied RIA to study blood insulin levels in diabetes mellitus, but the method soon found hundreds of other applications. For these discoveries, she shared the 1977 Nobel Prize in medicine, becoming only the second woman to win the award in this field. Who was the first? Discuss
Source: The Free Dictionary