of Microbe Hunters Julio Frenk (SPH: M.P.H. 1981, MA 1982, Ph.D. 1983), Minister of Health for Mexico Seraph Frissell (MED: MD 1875), physician, medical writer Raymond Gist, president of the American Dental Association Sanjay Gupta (MD: 1993), CNN anchor, reporter and senior medical correspondent; former neurosurgeon Lucy M. Hall (MED: MD 1878), first woman ever received at St Thomas' Hospital's bedside clinics Alice Hamilton (MED: MD 1893), specialist in lead poisoning and industrial diseases; known as the "Mother of Industrial Health;" in 1919 became the first woman on the faculty at Harvard Medical School; the first woman to receive tenure there; honored with her picture on the 55-cent postage stamp; winner of the Lasker Award Nancy M. Hill (MED: MD 1874), Civil War nurse and one of the first female doctors in the US Jerome P. Horwitz (Ph.D. 1950), synthesized AZT in 1964, a drug now used to treat AIDS Joel Lamstein (BS 1965), co-founder and president of John Snow, Inc. (JSI) and JSI Research & Training Institute, Inc., international public health research and consulting firms Josiah K. Lilly Jr. (1914 college of pharmacy), chairman and president of Eli Lilly Howard Markel (MED: MD 1986), physician, medical historian, best-selling author, medical journalist, and member of the National Academy of Medicine, George E. Wantz Distinguished Professor of the History of Medicine at the University of Michigan, Guggenheim Fellow William James Mayo (MED: MD 1883), co-founder of the Mayo Clinic Jessica Rickert, first female American Indian dentist in America, which she became upon graduating from the University of Michigan School of Dentistry in 1975. She was a member of the Prairie Band Potawatomi Nation, and a direct descendant of the Indian chief Wahbememe (Whitepigeon). Ida Rollins, first African-American woman to earn a dental degree in the United States, which she earned from the University of Michigan in 1890 Leonard Andrew Scheele (BA 1931), US Surgeon General 1948–1956 Eric B. Schoomaker (BS 1970, MED: MD 1975), Major General; Commander of the North Atlantic Regional Medical Command and Walter Reed Army Medical Center; former commanding general of the U.S. Army Medical Research and Materiel Command at Fort Detrick Thomas L. Schwenk (MED: MD 1975), dean of the University of Nevada School of Medicine John Clark Sheehan (MS 1938, Ph.D. 1941), chemist who pioneered the first synthetic penicillin breakthrough in 1957 Norman Shumway (MDNG), heart transplantation pioneer; entered the University of Michigan as a pre-law