In 1977, she received the Nobel Prize, together with Roger Guillemin and Andrew V. Schally for her role in devising the radioimmunoassay (RIA) technique that by measuring substances in the human body, that made possible the screening the blood of donors for such diseases as hepatitis among other uses. In 1977, Yalow received the Nobel prize for the invention she and Berson created. Radioimmunoassay (RIA) can be used to measure a multitude of substances found in tiny quantities in fluids within and outside of organisms (such as viruses, drugs and hormones). The list of current possible uses is endless, but specifically, RIA allows blood-donations to be screened for various types of hepatitis. The technique can also be used to identify hormone-related health problems. Further, RIA can be used to detect in the blood many foreign substances including some cancers. Finally, the technique can be used to measure the effectiveness of dose levels of antibiotics and drugs.