Immunogenicity and Safety of Co-immunization With Cecolin and Hecolin

Inclusion Criteria: * Female, aged between 18 and 25 years (including 18 and 25 years) on the day of enrollment * Judged as healthy and eligible for vaccination by the investigators through a self- reported medical history and some physical examinations * Willing to participate in this study and sign informed consent form * Able to understand this study information and willing to comply with all study requirements * Axillary temperature ≤37.0 °C * Negative urine pregnancy test Exclusion Criteria: * Women who are pregnant or breastfeeding or who plan to get pregnant within the next seven months * Use of any investigational product or non-registered product (drug or vaccine) within 30 days preceding the first dose of the study vaccine or plan to use during the study period * Received immunosuppressed, immunoregulation therapy or corticosteroid systemic therapy for more than 14 days in the 6 months before entry, except local treatment * Administration of any immunoglobulin or blood products within 3 months preceding the first dose of the study vaccine,or plan to use during the study period * Administration of any inactivated vaccines within 14 days preceding the first dose of the study or attenuated live vaccines within 21 days preceding the first dose of the study * Had a fever (axillary temperature over 38°C) within 3 days or acute illness requiring systemic antibiotics or antiviral treatment within 5 days before vaccination * Plan to participate in another clinical study a…