The Global Initiative on Primary Prevention of Substance Abuse (Global Initiative) is jointly executed by the United Nations International Drug Control Programme (UNDCP) and the World Health Organization (WHO). Implementation began in June 1997.

This document presents an evaluation of the process, results and impact of the initiative to promote health and prevent sexually transmitted diseases among adolescents and youth in the school environment (in Brazilian schools), on the basis of research carried out in 340 schools in 14 state capit