Florence R. Sabin, M.D., 1871-1953 was an American medical scientist and a pioneer for women in science. She was the first woman to hold a full professorship at Johns Hopkins School of Medicine, the first woman elected to the National Academy of Sciences, and the first woman to head a department at the Rockefeller Institute of Medical Research. In her retirement years, she pursued a second career as a public health activist in Colorado, and in 1951 received a Lasker Award for this work.