Loudi

Researchers are evaluating the protective effects, safety, and immune response of an 11-valent recombinant human papillomavirus HPV vaccine in Chinese women aged 18 to 45 years. This Phase III clinical trial involves 13,500 women divided into three age groups to assess the vaccines ability to prevent HPV infections and related cervical lesions. Participants are randomized into experimental and placebo groups to compare outcomes. The trial administers three doses of either the HPV vaccine or a placebo via intramuscular injections into the upper arm deltoid muscle, scheduled at 0, 2, and 6 months. The study uses a double-blind design to ensure unbiased results. The vaccine targets multiple HPV types associated with cervical cancer and related conditions. Participants will undergo follow-up visits including gynecological examinations, pregnancy testing, and monitoring for adverse events. Researchers will measure the incidence of cervical intraepithelial neoplasia CIN and HPV-related lesions, as well as antibody responses at multiple time points after vaccination. The trial includes long-term monitoring up to six years to evaluate vaccine safety and effectiveness.