Dausset, Jean, 1916-, French immunologist. He was the laboratory director of the National Blood Transfusion Center and was a professor at the Univ. of Paris (1958-77) and the Collège de France. He identified a gene complex (human leucocyte A complex) that accounted for different immunological reactions to blood transfusions in humans. This was similar to the H-2 complex in mice identified by George Snell. Dausset, Snell, and Baruj Benacerraf shared the 1980 Nobel Prize in Physiology or Medicine for their discoveries concerning the relationship between genetics and the immune system.