The U.S. Army and the Thailand Ministry of Public Health announced today the first ever successful HIV vaccine trial. The vaccine combined a primary vaccine, called ALVAC HIV vaccine, with a booster, the AIDSVAX B/E vaccine. When used together, the double vaccine led to a 30% decrease in the number of new HIV infections, which makes it the first successful HIV vaccine. There were no safety issues reported during the three-year clinical trial.

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Update: Please see the AIDS Beacon’s full coverage of the first effective HIV vaccine.