An observational study in Epidemic Meningitis, sponsored by CanSino Biologics Inc.. Not yet recruiting. Open to participants aged 7 Years to 9 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-08-03.
Sponsored by CanSino Biologics Inc. · Observational
This study included 180 trial participants who had previously taken part in the Phase IIIb clinical trial of the ACYW135 group meningococcal polysaccharide-conjugated vaccine (CRM197 carrier) for children aged 4-6 years (Protocol No.: CTP-MCVF-002) and had completed blood sample collection at 90 and 180 days post-vaccination; there were 90 participants in each of the treatment and control groups. All trial participants were required to provide 3.0-4.0 mL of blood samples for immunopersistence assessment at 3 and 5 years post-vaccination, respectively.
125 studies on the registry are indexed under Meningitis, Meningococcal; 10 are open to participants now.
This study's planned enrollment of 180 is close to the median of 180 across 11 observational studies indexed under Meningitis, Meningococcal.
Browse Meningitis, Meningococcal studies →CanSino Biologics Inc. is the lead sponsor of 41 studies on the registry; 6 are open to participants now.
Counted across the registry records on this site, refreshed daily.
This study included 180 trial participants who had previously taken part in the Phase IIIb clinical trial of the ACYW135 group meningococcal polysaccharide-conjugated vaccine (CRM197 vector) for children aged 4-6 years (Protocol No.: CTP-MCVF-002) and had completed blood sample collection at 90 and 180 days post-vaccination; there were 90 participants in each of the treatment and control groups.
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Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Other: Previously vaccinated with MCV4 (CanSino)
Other: Previously vaccinated with MPSV4 (LvZhu)
3.0 to 4.0 mL of venous blood will be collected for the immunodynamic study at 3 and 5 years after vaccination
3.0 to 4.0 mL of venous blood will be collected for the immunodynamic study at 3 and 5 years after vaccination
Geometric Mean Titers of Meningococcal Antibodies in Groups A, C, Y, and W135
Time frame: 3 and 5 Years After Vaccination
Positivity Rates of Meningococcal Antibodies in Groups A, C, Y, and W135
Time frame: 3 and 5 Years After Vaccination
Proportion of individuals with meningococcal antibody titers of ≥1:128 in serogroups A, C, Y, and W135
Time frame: 3 and 5 years after vaccination
No study locations are listed for this record.
This study is not yet recruiting, as verified in Jul 2026. You cannot join it, but the record below documents what was studied.
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