Gerald Callahan is a professor in the Department of Microbiology, Immunology and Pathology and the chair of the Creative Nonfiction Graduate Program. His research focuses on interactions between the human immune and nervous systems, humans and their microbiomes, and the biological basis of sex.
Callahan is the author of four books, two of which were finalists for the Colorado Book Award in general nonfiction, and he is currently under contract with University Press of Colorado for two more. His book Faith, Madness, and Spontaneous Human Combustion: What Immunology Can Teach Us About Self-Perception was nominated for a Pulitzer Prize in 2003.
Callahan studied at the University of Utah, earning his B.S. in Biological Science in 1969 and his Ph.D. in Experimental Pathology in 1974.