NCT06866574 2025-07-31A Phase III Trial to Evaluate the Efficacy, Immunogenicity and Safety of a Recombinant Human Papillomavirus 9-Valent (Types 6, 11, 16, 18, 31, 33, 45, 52, 58) Vaccine (E.Coli) in Chinese MalesXiamen UniversityPhase 3 Active not recruiting9,300 enrolled