Lei Zhu and Maj. Kelly Ray, both Clinical Research coordinators from the Walter Reed Army Institute, Clinical Trials Center prepare samples prior to the RV575 Research study, Sept. 27. In October, the U.S. Military HIV Research Program will launch the Phase 1 study, evaluating varying doses of the Army's novel ALFQ adjuvant in a candidate HIV vaccine to determine the optimal adjuvant dosage level. (U.S. Army photo by Mike Walters/ Released)