• Multi-site, school- and community-based prevention using social-influences strategies to curb adolescent drug and tobacco use; long-term follow-ups show sustained effects across sites [6], [2], [3], [17], [13].

• Examination of homeless/runaway youth reveals changing needs and the necessity of integrated, youth-centered care systems; program evaluations and position papers emphasize systemic responses [1], [8], [9], [14], [10].

• Health, well-being, and social determinants are central to youth advocacy; prevention guidelines link education, risk reduction, and community programs in national and local contexts [11], [4], [12], [5].

• Risk-behavior prevention and policy development cover smoking, tobacco control, and delinquency; school-based interventions and expert recommendations show lasting effects and policy directions [3], [15], [13], [16], [19].

• Policy formation and service system design for youth services, including program governance and outreach for runaway/homeless youth and prevention programs [9], [10], [8], [5].