One shot to prevent cancer: new HPV vaccine tested in zambia

NCT ID NCT07256912

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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study tests whether a single dose of the CERVAVAC HPV vaccine works as well as a single dose of Gardasil in preventing HPV infection. About 1,266 girls, boys, and young women in Zambia will receive one shot of either vaccine. Researchers will check their immune response at 6, 12, and 24 months to see if the vaccines are equally effective.

What this could mean

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

Active substance
quadrivalent HPV vaccine (CERVAVAC or Gardasil)
What this could lead to
If successful, a single dose of CERVAVAC could offer a simpler, cheaper way to prevent cervical cancer in young people.
What could go wrong
This is a Phase 4 trial, but it only measures immune response, not actual cancer prevention. Results may not apply to other populations or HPV types.

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 1,266 people

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

Expected to start

Apr 2026

An estimate. Start dates often move.

Expected to finish

Jan 2029

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

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

Ages

9 to 20 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: 1. Girl/woman between 9 and 20 years of age and boy between the age of 9 and 14 years at the time of recruitment. 2. Participant willing to sign a written informed consent (for participants 18 years of age and above). 3. Parent (s) willing to provide written informed consent and participant is willing to sign written assent form for participation (for participants below 18 years of age at the time of eligibility assessment). 4. Participant or parent (s) willing to comply with all study requirements. 5. Participants who are determined by Medical History (MH), Physical Examination (PE) and clinical judgment of the Investigator to be eligible for inclusion in the study. Exclusion Criteria: 1. Participants who are sexually active and missed their last menstrual period will have a urine pregnancy test and will be excluded if found pregnant. 2. Participant has a known history of prior vaccination with any HPV vaccine. 3. Participant known to be HIV positive (no routine HIV testing will be performed unless clinically indicated) 4. Participant currently enrolled in any other clinical studies of investigational products. 5. Participant with a current diagnosis or prior history of genital warts or treatment of genital warts. 6. Participant with a current diagnosis or prior history of cervical intraepithelial neoplasia (CIN) or cervical cancer. 7. Participant has a history of any allergic diseases or severe allergic reaction to any agent/vaccine product (e.g., swelling of the mouth and throat, difficulty in breathing, hypotension, or shock). 8. Participant has had an acute illness (moderate or severe) and/or fever (body temperature ≥ 38°C or ≥ 100.4 °F) at the time of vaccination or during the 72 hours prior to the vaccination. 9. Bleeding diathesis or uncontrolled condition associated with prolonged bleeding that would, in the opinion of the Investigator, contraindicate IM injection. 10. Participant has history of major congenital defects or illness that requires medical therapy, as determined by MH or clinical assessment. 11. Participant has had chronic administration (defined as more than 14 days) of high doses of corticosteroids (prednisone or equivalent at a dose of \>0.5 mg/kg/day), cytotoxic agents or radiotherapy or immunoglobulins, immunosuppressants or other immune-modifying drugs in last 3 months or planned at any time during the study. 12. Participant has history of receiving a blood transfusion or other blood products in three months prior to screening. 13. Planned administration of a vaccine not foreseen by the study protocol within 14 days before and 14 days after any dose of study vaccine except TT given for emergency use and any vaccine mandated by government program. 14. Participant has history of any major pulmonary, cardiovascular, renal, neurological, metabolic, gastro-intestinal, hepato-biliary, hematological functional abnormality, mental or physical disability, blood dyscrasia or any condition which in the opinion of the Investigator might interfere with the evaluation of the study objectives. 15. Participant has history of any cancer, organ transplant or any other immune system disease. 16. Individuals who, in the opinion of the investigator, are unlikely to be compliant to all study procedures

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Conditions

The condition(s) this trial relates to.

As listed by the trial registrant

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

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

  • Chipata and Matero First Level Hospitals

    Lusaka, Zambia

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