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Could a single meningitis shot protect for years? a study investigates

NCT ID NCT07743411

Knowledge-focused Sponsor: CanSino Biologics Inc. Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting This study
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Aug 03, 2026 · Last updated Aug 04, 2026 · Updated 1 time

Summary

This study follows 180 children who received a meningitis vaccine (ACYW135 conjugate) years ago to see if their immune protection lasts. Researchers will measure antibody levels in blood samples taken 3 and 5 years after vaccination. The goal is to understand how long immunity persists and whether booster doses might be needed.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
ACYW135 meningococcal conjugate vaccine (CRM197 vector)
What this could lead to
If successful, this could show how long protection lasts and whether a booster is needed years later.
What could go wrong
This is a small, observational follow-up, not a new treatment test. Results may not apply to all children or predict real-world protection.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

About 180 people

The number the study aims to enrol. It can still change while the study runs.

Expected to start

Sep 2026

An estimate. Start dates often move.

Expected to finish

Sep 2028

An estimate. End dates often move.

Lead sponsor

A company

The lead sponsor is a pharmaceutical, biotech, or medical-device company.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

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.

Ages

7 to 9 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Individuals who previously participated 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 were included in both the IPS1 and IPS2 analysis sets * Willing to provide identification documents * Willing to provide informed consent, voluntarily sign the informed consent form, and comply with the requirements of the clinical study protocol * The interval since completion of the vaccination series must be at least 3 years Exclusion Criteria: * Received another meningococcal vaccine after completion of the CTP-MCVF-002 trial * Has thrombocytopenia, any coagulation disorder, or is currently receiving anticoagulant therapy * Has a history of meningitis since the end of the CTP-MCVF-002 trial * Other conditions deemed by the investigator to make the subject ineligible for this clinical study

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Conditions

The condition(s) this trial relates to.

meningococcal meningitis prevention target

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Epidemic meningitis

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  2. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

More trials for these conditions

Other studies related to the condition(s) this trial covers.