Barriers to HPV Vaccination in Peru: The Role of Digital Strategies in a Context of Social and Structural Inequity. Principles and Practice of Clinical Research, [S. l.], v. 11, n. 4, 2026. DOI: 10.21801/ppcrj.2025.114.2. Disponível em: https://www.journal.ppcr.org/index.php/ppcrjournal/article/view/433.. Acesso em: 27 apr. 2026.