RecruitingPhase 3NCT07135986

Immunogenicity and Safety Study of an Investigational Quadrivalent Meningococcal Conjugate Vaccine Administered in Healthy Children and Adolescents in China

A Phase 3, Modified Double-blind, Multi-center Study of the Immunogenicity and Safety of an Investigational Quadrivalent Meningococcal Conjugate Vaccine Administered in Healthy Children and Adolescents (2 to 17 Years of Age) in China


Sponsor

Sanofi

Enrollment

1,602 participants

Start Date

Sep 26, 2025

Study Type

INTERVENTIONAL

Conditions

Summary

This is a Phase 3, modified double-blind, randomized, parallel-group, active-controlled, multicenter study with 2 arms and 4 groups to evaluate the immunogenicity and safety of MenACYW conjugate vaccine in children and adolescents versus control meningococcal vaccines licensed in China. Study details include: * The study duration will be approximately 180 days. * The vaccination visit will be Visit 1. * The visit frequency will be 2 on-site visits with a 30-day interval. A safety visit/telephone call is planned on the ninth day after the vaccination for all groups; a safety follow-up telephone call is planned for all groups 180 days post the last vaccination.


Eligibility

Min Age: 2 YearsMax Age: 17 Years

Inclusion Criteria3

  • For Cohort I: Aged 7 to 17 years on the day of inclusion ("7 to 17 years" means from the day of the 7th birthday to the day before the 18th birthday.). For Cohort II: Aged 2 to 6 years on the day of inclusion (2 to 6 years" means from the day of the 2nd birthday to the day before the 7th birthday.)
  • Participants who are healthy as determined by medical evaluation including medical history and physical examination.
  • A female participant is eligible to participate if she is not pregnant or breastfeeding

Exclusion Criteria17

  • Known or suspected congenital or acquired immunodeficiency; or receipt of immunosuppressive therapy; or long-term systemic corticosteroid therapy
  • History of meningococcal infection
  • History of any neurologic disorders
  • History of Guillain-Barré syndrome
  • History of an Arthus-type hypersensitivity reaction after a previous dose of tetanus toxoid-containing vaccine
  • At high risk for meningococcal infection during the trial
  • Known systemic hypersensitivity to any of the vaccine components
  • Self-reported thrombocytopenia, contraindicating intramuscular vaccination.
  • Bleeding disorder, or receipt of anticoagulants in the 3 weeks preceding inclusion, contraindicating intramuscular vaccination.
  • Chronic illness that, in the opinion of the Investigator, is at a stage where it might interfere with trial conduct or completion.
  • Moderate or severe acute illness/infection
  • Alcohol, prescription drug, or substance abuse that, in the opinion of the Investigator, might interfere with the study conduct or completion.
  • Receipt of any vaccine in the 4 weeks preceding the trial vaccination or planned receipt of any vaccine in the 4 weeks following trial vaccination.
  • The time since last vaccination of meningococcal vaccine was 2 years or less.
  • Receipt of immune globulins, blood or blood-derived products in the past 3 months.
  • Receipt of oral or injectable antibiotic therapy within 72 hours prior to the first blood draw.
  • The above information is not intended to contain all considerations relevant to a patient's potential participation in a clinical trial.

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Interventions

BIOLOGICALMenACYW conjugate vaccine

Pharmaceutical form:Liquid solution-Route of administration:Intramuscular (IM) injection

BIOLOGICALMenACYW135 polysaccharide vaccine

Pharmaceutical form: Lyophilized powder-Route of administration:IM injection

BIOLOGICALMenAC conjugate vaccine

Pharmaceutical form:Lyophilized powder-Route of administration:IM injection


Locations(2)

Investigational Site Number : 1561000

Nanning, Guangxi, China

Investigational Site Number : 1561003

Liuchow, China

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NCT07135986


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