He was recruited to the Boston University Medical Campus from Brigham and Women’s Hospital in 2012. Dr. Sagar’s research focuses on the pathogenesis of human immunodeficiency virus type 1 heterosexual transmission. He has been a member of the AIDS Clinical Trials Group (ACTG) since 2005. Dr. Sagar has served on numerous committees including NIH study sections and Doris Duke Charitable Foundation Early Career Development Award Review Committee. He is an active member of the Infectious Diseases Society of America (IDSA).