Effectiveness of an HIV prevention program for secondary school students in Mongolia.

Purpose: To evaluate the effectiveness of a 3-year human immunodeficiency virus (HIV) prevention program for adolescents attending secondary school in Mongolia.

Methods: Comparisons of knowledge, attitudes, self-efficacy and safe sex practices of grade 10 students from schools with a peer education prevention program to grade 10 students from schools without the intervention. Peer education programs were launched in 2000 across Mongolia.