Loudi

Researchers are evaluating the protective effects, safety, and immune response of an 11-valent recombinant human papillomavirus (HPV) vaccine called Hansenulapolymorpha in Chinese women aged 18 to 45 years. This Phase III randomized, blinded, placebo-controlled trial involves 13,500 women divided into three age groups: 18-26, 27-35, and 35-45 years. The study aims to assess the incidence of cervical intraepithelial neoplasia grade 2 or higher (CIN2+) associated with various HPV types after vaccination. Participants receive either the 11-valent HPV vaccine or a placebo through intramuscular injections in the upper arm deltoid muscle. The vaccination schedule includes three doses given at 0, 2, and 6 months. The trial compares the vaccine's effects against placebo across the different age groups, following strict immunization timing. During the study, women attend follow-up visits and provide information through diary cards and contact forms. Researchers monitor safety, immune responses, and HPV-related cervical changes, including CIN2+ occurrences one month after the third dose. The trial also includes pregnancy testing before vaccination and requires effective contraception during the study. Total participation includes vaccination and follow-up over approximately six years to evaluate long-term outcomes.