Quote from www.thebody.com:
HIV Vaccine Study First to Show Some Effectiveness in Preventing HIV
September 24, 2009
Rockville, Md. — A Phase III clinical trial involving more than 16,000 adult volunteers in Thailand has demonstrated that an investigational HIV vaccine regimen was safe and modestly effective in preventing HIV infection. According to final results released by the trial sponsor, the U.S. Army Surgeon General, the prime boost combination of ALVAC® HIV and AIDSVAX® B/E lowered the rate of HIV infection by 31.2% compared with placebo.
Full article linked below: