Reuben Leon Kahn

Reuben Leon Kahn (born July 26, 1887, Kovno [now Kaunas], Lithuania—died July 22, 1979, Miami?, Fla., U.S.) was an American immunologist best known for his investigations of blood reactions, which led him to develop an efficient test for syphilis. While serving with the U.S. Army (1917–19) and the Michigan State Department of Health (1920–28), Kahn found that, under carefully controlled conditions, the mixing of an infected blood sample, beef heart muscle serum, and a quantity...