One shot to prevent cancer: new HPV vaccine tested in zambia
NCT ID NCT07256912
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
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Phase 4
Runs after approval, following long-term safety and how well the treatment works in everyday use.
- Participants
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About 1,266 people
The number the study aims to enrol. It can still change while the study runs.
- Expected to start
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Apr 2026
An estimate. Start dates often move.
- Expected to finish
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Jan 2029
An estimate. End dates often move.
- Lead sponsor
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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
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9 to 20 years
- Sex
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Anyone
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
Show the full entry requirements Hide 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.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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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
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Chipata and Matero First Level Hospitals
Lusaka, Zambia
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Other studies related to the condition(s) this trial covers.
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