In the midst of the most promising era in HIV prevention research since the AIDS epidemic began, scientists from around the world will present more than 400 new studies outlining advances in the search for a safe and effective HIV vaccine at AIDS Vaccine 2011. This global conference, the world’s only scientific meeting dedicated exclusively to HIV vaccine research, runs Monday, 12 September through Thursday, 15 September in Bangkok. This is the first time that the annual AIDS Vaccine conference has been held in Asia.