By giving an HIV-positive infant anti-HIV drugs within hours of birth, Gay, a pediatrician at the University of Mississippi Medical Center, was responsible for orchestrating an incredible breakthrough. Gay, a 1976 graduate of the University of Mississippi with a B.A. in biology and chemistry and a member of the Sally McDonnell Barksdale Honors College, has been honored by TIME Magazine as one of the 100 most influential people in the world. Read the story.