Durban, South Africa – Several studies presented today in an official press conference at the 21st International AIDS Conference (AIDS 2016) in Durban provided new insights on the use of PrEP among a broad range of populations. One study provided new national estimates of PrEP use in the U.S. by geography and other demographics, another found the near elimination of HIV transmission risk among serodiscordant heterosexual couples using both PrEP and antiretroviral treatment, and two additional studies examined PrEP use among adolescents in both southern Africa and the U.S.