Immunogenicity and Safety of HPV-4 Vaccine With or Without Td Vaccine in Children

This study will evaluate the safety and immune response of a single dose of a quadrivalent human papillomavirus (HPV) vaccine when given together with a tetanus-diphtheria (Td) vaccine in healthy children and adolescents aged 9 to 15 years. The study will compare participants who receive the HPV vaccine together with the Td vaccine with those who receive the HPV vaccine alone. The study will assess whether giving the two vaccines together produces an immune response to HPV that is not lower than giving the HPV vaccine alone.