A brief HIV intervention for adolescents and young adults.

The delivery format of an HIV prevention program that had been efficacious with youths at high risk was modified from seven relatively short sessions over a one- to two-month period to three longer sessions over a one- to two-week period. In contrast to youths in the seven-session program, no change in sexual behavior was observed among those in the redesigned program at three-month follow-up. However, change was apparent in the mediators of high-risk behavior over the same period.