Clarence James Peters, Jr, M.D. (born September 23, 1940, Midland, Texas), known as C. J. Peters, is a physician, field virologist and former U.S. Army colonel. He is noted for his efforts in trying to stem epidemics of exotic infectious diseases such as the Ebola virus, Hanta virus and Rift Valley fever (RVF). He is an eminent authority on the virology, pathogenesis and epidemiology of hemorrhagic fever viruses.
Peters grew up in Odessa, Texas. At Rice University, he initially majored in chemical engineering, but switched to chemistry his junior year after taking courses with Thomas Brackett. He obtained his medical degree at Johns Hopkins School of Medicine and served his residency in internal medicine at the University of Texas Southwestern Medical School. He developed an interest in tropical medicine and virology while serving five years as a research associate at the National Institute of Allergy and Infectious Disease intramural laboratory in Panama. Upon returning Stateside, he completed his fellowship in immunology at the Scripps Clinic and Research Foundation.