Early HIV vaccine trial shows promise – but still a long way to go
NCT ID NCT04844775
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This Phase 1 trial tested a new HIV vaccine in 68 healthy adults to see if it is safe and triggers an immune response. The vaccine uses a DNA-based approach combined with an HIV protein to train the body to fight the virus. While early results are encouraging, this is just the first step – much more research is needed to know if it can actually prevent HIV.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- HIV vaccine (DREP-HIV-PT1 and CN54gp140+MPLA-L)
- What this could lead to
- If successful, this could point toward a safe and effective HIV vaccine that prevents infection.
- What could go wrong
- This is a very early Phase 1 trial with only 68 participants. It only tests safety and immune response, not whether the vaccine actually prevents HIV. Many early vaccines fail in later stages.
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 1
The first testing in people. Mainly checks safety and dose, usually in a small group.
- Participants
-
68 people
The number who actually took part.
- Started
-
Aug 2022
- Finished
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Sep 2024
- Lead sponsor
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A government agency
The lead sponsor is a government body.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
-
18 to 55 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. Healthy adults aged 18- 55 years on the day of screening 2. BMI between 18-30 kg/m2 (inclusive) 3. Unlikely to acquire HIV during follow-up 4. Willing and able to provide written informed consent 5. If female and of childbearing potential\* age and not sterilised, willing to use a highly effective method of contraception from screening until 12 weeks after last injection 6. If male and not sterilised, willing to avoid impregnating female partners from screening until 12 weeks after last injection\*\* 7. Willing to avoid all other vaccines from 28 days before the first injection through to 28 days after subsequent study injections 8. Willing and able to comply with visit schedule and provide blood samples 9. Being covered by medical insurance or in National Healthcare System * A woman will be considered of childbearing potential following menarche and until becoming post-menopausal unless permanently sterile. Permanent sterilisation methods include hysterectomy, bilateral salpingectomy and bilateral oophorectomy. * It is recommended that participants have an up to date vaccination status for any required immunisations including authorised COVID-19 vaccines Exclusion Criteria: 1. Pregnant or lactating 2. Has a significant clinical history, physical finding on clinical examination during screening, or presence of a disease that is active or requires treatment to control it, including cardiac, respiratory, endocrine, metabolic, autoimmune, liver, neurological, oncological, psychiatric, immunosuppresive/immunodeficient or other disorders which in the opinion of the investigator is not compatible with healthy status, may compromise the volunteer's safety, preclude vaccination or compromise interpretation of the immune response to vaccine. Individuals with mild/moderate, well-controlled comorbidities are allowed. 3. HIV 1 or 2 infection or indeterminate test at screening 4. History of anaphylaxis or angioedema 5. History of severe or multiple allergies to drugs or pharmaceutical agents 6. Known hypersensitivity to any component of the vaccine formulation used in this trial 7. History of severe local or general reaction to vaccination defined as 1. local: extensive, indurated redness and swelling involving most of the arm, not resolving within 72 hours 2. general: fever \>= 39.5oC within 48 hours; anaphylaxis; bronchospasm; laryngeal oedema; collapse; convulsions or encephalopathy within 72 hours 8. Receipt of any experimental vaccine within 5 years from screening. 9. Receipt of blood products or immunoglobulins within 18 weeks of screening. 10. Receipt any of immunosuppressive agents within 18 weeks of screening by any route other than skin and intranasal. 11. Detection of antibodies to hepatitis B \& C 12. Participating in another clinical trial with an investigational drug or device, or treated with an investigational drug within 28 days of screening 13. Any of the values that are confirmed on repeat testing as defined in protocol
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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.
Contacts and locations
Locations
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CHUV
Lausanne, Canton of Vaud, 1011, Switzerland
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CIC Cochin
Paris, Paris Cedex 14, 75679, France
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Chelsea and Westminster Hospital
London, SW10 9NH, United Kingdom
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Hôpital Henri Mondor
Créteil, Paris, 94010, France
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