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One HPV shot still working 6 years later? quebec study finds out

NCT ID NCT07156084

Knowledge-focused Sponsor: Canadian Immunization Research Network Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study looks at whether a single dose of the 9vHPV vaccine, given to 9-11 year olds in 2019-2020, still provides protection six years later. About 300 teens (150 girls and 150 boys) will give a small blood sample to measure HPV antibodies. The goal is to understand how long one vaccine dose lasts, especially in boys, where data is limited.

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.

Phase

Phase 4

Runs after approval, following long-term safety and how well the treatment works in everyday use.

Participants

About 300 people

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

Started

Sep 2025

Expected to finish

Feb 2026

An estimate. End dates often move.

Lead sponsor

A research network

The lead sponsor is a research network or cooperative group.

Who can take part

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

Ages

15 to 17 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: * Have received a single dose of 9vHPV vaccine at ages 9-11 during the school year 2019-2020; * Not have received any other HPV vaccine doses; * Be able to consent to the study. Exclusion Criteria: * Immunosuppressed (at recruitment or when immunized).

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Conditions

The condition(s) this trial relates to.

human papilloma virus infection prevention target

As listed by the trial registrant

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

HPV vaccine

How to take part

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

  1. The places running it

    1 site. The list below names each one and where it is.

  2. 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 ↗

  3. 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.

Contacts and locations

Locations

  • Centre de recherche du CHU de Québec-Université Laval

    RECRUITING

    Québec, Quebec, G1X4S9, Canada

More trials for these conditions

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