CI

At a glance

ClinicalIndex Comparison Record
Phase 3Active· 209 enrolled
Drug / intervention
Meningococcal Polysaccharide (Serogroups A, C, W, and Y) Tetanus Toxoid Conjugate Vaccinebiological
Likely dose
Not stated in record
Structured eligibility isn't available for this trial yet — see the full criteria in the Eligibility tab below.

Standardized by ClinicalIndex from the ClinicalTrials.gov record · verify against the source.

Search/NCT04936685
NCT04936685Phase 3Active

A Phase IIIb, Open-label, Multi-center Study to Evaluate the Immunogenicity and Safety of a Booster Dose and Describe the Immune Persistence of MenACYW Conjugate Vaccine With 5- and/or 10-year Booster Doses in Children and Adolescents Who Had Been Primed With MenACYW Conjugate Vaccine as Toddlers.

Sanofi Pasteur, a Sanofi Company·interventional·Posted Jun 23, 2021·Updated Jul 4, 2025

In Brief

A Phase 3 clinical trial evaluating Meningococcal Polysaccharide (Serogroups A, C, W, and Y) Tetanus Toxoid Conjugate Vaccine for Meningococcal Immunisation and Healthy Volunteers. Active but no longer recruiting, targeting 209 participants across 26 sites in 4 countries.

Detailed Summary

The purpose of the MEQ00073 study is to assess the immunogenicity and safety of a booster dose in children who had been vaccinated with MenACYW conjugate vaccine approximately 5 years earlier as toddlers as part of the MET51 study, and to describe the persistence of a priming dose in children and adolescents who had been vaccinated with MenACYW conjugate vaccine approximately 5 years or 10 years earlier as toddlers as part of the MET51 study, the immunogenicity and safety of a booster dose in adolescents who had been primed with MenACYW conjugate vaccine as toddlers as part of the MET51 study, and the immunogenicity and safety of a second booster dose in adolescents approximately 5 years after a first booster dose as children approximately 5 years after the priming dose as toddlers.

Study Details

Study Typeinterventional
Allocation--
Masking--
Primary Purpose--
CountriesFinland, Germany, Hungary, Spain
Collaborators--

Timeline

Phase 3Active
2022202320242025202620272028
First PostedJun 23, 2021
Enrollment StartAug 23, 2022
Primary CompletionMar 9, 2023
Study CompletionDec 26, 2027
TodayJul 2, 2026
Enrollment to primary: 7 monthsPosted 5.0 years ago

Interventions

Meningococcal Polysaccharide (Serogroups A, C, W, and Y) Tetanus Toxoid Conjugate Vaccinebiological

Liquid solution for injection Intramuscular