Professor Cohen is the architect and principal investigator of the multinational HPTN 052 trial which demonstrated that antiretroviral treatment prevents the sexual transmission of HIV-1. This work was recognized by Science Magazine as the “Breakthrough of the Year” in 2011. He is the J. Herbert Bate Distinguished Professor of Medicine, Microbiology and Immunology and Epidemiology at the University of North Carolina at Chapel Hill. He also serves as chief of the Division of Infectious Diseases, Director of the Institute for Global Health & Infectious Diseases, and Associate Vice Chancellor for Global Health.