To mark HIV Vaccine Awareness Day on May 18, US and Thai HIV vaccine researchers are presenting information around ongoing work that resulted from Thailand’s landmark RV144 vaccine study — the only HIV vaccine clinical trial to show efficacy to date. Researchers at the Armed Forces Research Institute of Medical Science (AFRIMS) in Bangkok, along with The U.S. Military HIV Research Program (MHRP) at the Walter Reed Army Institute of Research and Thai government and university partners, play a critical role in advancing HIV vaccine development worldwide.