David T. Imagawa; Helped Develop Measles Vaccine

David T. Imagawa, 69, internationally recognized immunologist and virologist who helped develop the measles vaccine and did research on AIDS. A native of Isleton, Calif., Imagawa was interned in a camp for Japanese-Americans during World War II. He earned his doctorate in bacteriology at the University of Minnesota and did research at Japan National Institute. His 1989 lead article in the New England Journal of Medicine provided insight into how the human immunodeficiency virus causes AIDS. He was named to the staff of UCLA Medical School in 1952 and taught until last July, when he became professor emeritus. On Nov. 29 in Rancho Palos Verdes of a heart attack.