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MRNA HIV vaccines enter human trials in south africa

NCT ID NCT06694753

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
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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jul 02, 2026 · Updated 2 times

Summary

This early-stage trial tests three experimental mRNA vaccines designed to train the immune system to fight HIV. The study involves 96 healthy adults without HIV in South Africa. Researchers will check for side effects and measure whether the vaccines trigger specific immune cells that could neutralize the virus.

What this could mean

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

Active substance
mRNA vaccines encoding HIV immunogens (eOD-GT8 60mer, Core-g28v2 60mer, N332-GT5 gp151)
What this could lead to
If successful, this could point toward a safe and effective HIV vaccine, potentially preventing infection.
What could go wrong
This is an early phase 1 trial with only 96 participants, so it may not prove effective. The vaccines may cause side effects or fail to generate strong immune responses.

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

About 96 people

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

Started

Dec 2025

Expected to finish

Mar 2027

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

18 to 55 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. Demonstrates an understanding of the study and is able and willing to complete the informed consent process. 2. 18 to ≤ 55 years old, on day of enrollment. 3. Available for clinic follow-up through the last clinic visit. 4. Willingness to undergo FNA and leukapheresis. 5. Agrees not to enroll in another study of an investigational agent during participation in the trial. If a potential participant is already enrolled in another clinical trial, approvals from the other trial Sponsor and the IAVI Medical Monitor are required prior to enrollment into DESIIGN001/IAVI G004. 6. In good general health according to the clinical judgment of the Investigator. 7. Physical examination and laboratory results without clinically significant findings that would interfere with assessment of safety or reactogenicity in the clinical judgment of the Investigator. 8. Assessed by clinical staff as having a low likelihood of acquiring HIV per guidelines (see Appendix 4), agrees to discuss their potential for HIV acquisition, agrees to prevention counseling, and agrees to avoid behaviors associated with a higher likelihood of acquiring HIV through the final study visit. "Low likelihood" may include persons stably taking pre-exposure prophylaxis (PrEP) as prescribed in Appendix 4. 9. Hemoglobin (Hgb): * ≥12.0 g/dL for AFAB volunteers * ≥13.0 g/dL for cisgender AMAB volunteers or for volunteers who have been on masculinizing hormone therapy for more than 6 consecutive months * ≥12.0 g/dL for AMAB volunteers who have been on feminizing hormone therapy for more than 6 consecutive months * For volunteers who have been on gender-affirming hormone therapy for less than 6 consecutive months, determine Hgb eligibility based on their sex assigned at birth. 10. White blood cell (WBC) count = 2,500 to 12,000/mm3. 11. Platelets = 125,000 to 550,000/mm3. 12. Alanine aminotransferase (ALT) \<2.5 × upper limit of institutional reference range. 13. Serum creatinine ≤1.1× upper limit of normal (ULN) based on the institutional normal range. 14. Systolic blood pressure of 90 to \<140 mmHg and diastolic blood pressure of 50 to \<90 mmHg at the screening visit. The average blood pressure between the screening visit and the enrollment visit must be below 140 mmHg systolic and 90 mmHg diastolic. A single measurement ≥160 mmHg systolic or 100 mmHg diastolic during the current study evaluation is exclusionary. 15. Negative HIV test results by one of the following options: * A negative European Conformity (CE)-marked enzyme immunoassay (EIA) * A chemiluminescent microparticle immunoassay (CMIA) * A negative result on 2 HIV rapid tests (one of these rapid tests must be CE-marked) 16. Negative for anti-Hepatitis C virus (HCV) Abs (anti-HCV) or negative HCV nucleic acid test (NAT) if anti-HCV Abs are detected. 17. Negative for Hepatitis B surface antigen (HBsAg). 18. For volunteers AFAB or assigned intersex at birth who are capable of becoming pregnant (hereafter referred to as "persons of pregnancy potential"): * Must agree to use effective means of contraception from at least 21 days prior to enrollment through 8 weeks after their last scheduled vaccination time point (see Appendix 5). * Must have a negative beta human chorionic gonadotropin (β-HCG) pregnancy test (urine or serum) on day of enrollment. Note: Persons who are NOT of pregnancy potential due to total hysterectomy or bilateral oophorectomy or menopause (no menses for ≥1 year) are not required to undergo pregnancy testing. 19. Volunteers AFAB or assigned intersex at birth must agree to not seek pregnancy through alternative methods, such as oocyte retrieval, artificial insemination, or in vitro fertilization from at least 21 days prior to enrollment through 8 weeks after their last scheduled vaccination time point. Exclusion Criteria: 1. Volunteer is nursing or pregnant. 2. Body mass index (BMI) ≥40 kg/m2. Enrollment of individuals with BMI ≥40 kg/m2, whom the site investigator assesses are in good health, may be considered by the IAVI Medical Monitor. 3. Diabetes mellitus (DM). Type 2 DM controlled with diet alone (and confirmed by HgbA1c ≤7% within the last 6 months) or a history of isolated gestational diabetes are not exclusionary. Enrollment of individuals with Type 2 DM that is well controlled on hypoglycemic agent(s) may be considered by the IAVI Medical Monitor on a case-by-case basis, provided that the HgbA1c is ≤8% within the last 6 months (CRC staff may draw these at screening). 4. Previous or current recipient of an investigational HIV vaccine (previous placebo/control recipients are not excluded). 5. Receipt of non-HIV investigational vaccine(s) received within the last 1 year. Exceptions include vaccines that have subsequently undergone licensure or Emergency Use Authorization (EUA) by the FDA or World Health Organization (WHO) Emergency Use Listing (EUL), or if outside the US, by the national Regulatory Authority authorizing this clinical trial. 6. Congenital or acquired immunodeficiency, including systemic medication use likely to impair immune response to vaccine in the opinion of the Investigator, such as glucocorticoid use, prednisone ≥10 mg/day within 3 months prior to enrollment. 7. Blood products or immunoglobulin within 16 weeks prior to enrollment; receipt of immunoglobulin within 16 weeks prior to enrollment requires approval by the IAVI Medical Monitor. 8. Previous receipt of VRC01 or VRC07-523LS monoclonal antibody (mAb). 9. Receipt of any vaccine within 4 weeks prior to enrollment or planned receipt within 4 weeks of investigational vaccine administration. 10. History of myocarditis and/or pericarditis. 11. A past history of immune-mediated disease, including but not limited to thyroid disease, rheumatoid arthritis, systemic lupus erythematosus, Sjögren's syndrome, celiac disease, seronegative inflammatory arthritis, systemic sclerosis, and Type 1 diabetes (for other examples, see Appendix 8). 12. History of or active severe skin conditions, including, but not limited to, cutaneous mastocytosis, psoriasis, atopic dermatitis, lichen planus, hidradenitis suppurativa, bullous pemphigoid, and urticarial vasculitis. 13. Systemic or local conditions with urticaria as a manifestation, including urticarial vasculitis, maculo-papular cutaneous mastocytosis (formerly urticaria pigmentosa), mast cell activation syndrome, Gleich's syndrome (episodic angioedema with eosinophilia), Well's syndrome (granulomatous dermatitis with eosinophilia/eosinophilic cellulitis), bullous pemphigoid, or adult-onset Still's disease. 14. Receipt of antigen-based immunotherapy. 15. Receipt of investigational research agents with a half-life of 7 or fewer days within 4 weeks prior to enrollment. If a potential participant has received investigational agents with a half-life of more than 7 days (or unknown half-life) within the past year, approval by the IAVI Medical Monitor is required for enrollment. 16. History of serious reaction (eg, hypersensitivity, anaphylaxis) to any vaccine or component of the study-vaccine regimen. 17. History of hereditary angioedema, acquired angioedema, or idiopathic forms of angioedema. 18. History of urticaria and/or dermatographism. 19. History of atopy (diagnosed or confirmed by a clinician). 20. Bleeding disorder diagnosed by a clinician that would make study procedures a contraindication. 21. History of seizure(s) within the past 3 years, or if volunteer has used medications to prevent or treat seizure(s) at any time within the past 3 years. 22. Asplenia or functional asplenia. 23. Any other chronic or clinically significant condition that, in the clinical judgment of the Investigator, would jeopardize the safety or rights of the study participant, including but not limited to: clinically significant forms of substance use or alcohol use disorder(s), serious psychiatric disorders, any suicide attempt within the past 1 year (if between 1 and 2 years, consult the IAVI Medical Monitor for approval), or cancer that, in the clinical judgment of the Investigator, has potential for recurrence (excluding basal cell carcinoma). 24. Asthma (diagnosed or confirmed by a clinician). 25. History of allergy to local anesthetic (Novocaine, Lidocaine). 26. Investigator concern for difficulty with venous access based on clinical history and physical examination. For example, persons with a history of intravenous drug use or substantial difficulty with previous blood draws. 27. Has donated ≥450 mL of blood products within 28 days prior to the Screening Visit or plans to donate blood products within 28 days post study injection. 28. Is working or has worked as study personnel or is an immediate family member or house member of study personnel, study site staff, or Sponsor personnel.

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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

  • CAPRISA eThekwini CRS

    Durban, KwaZulu-Natal, 4001, South Africa

  • Desmond Tutu Health Foundation Emavundleni CRS

    Cape Town, Western Cape, 7750, South Africa

  • Desmond Tutu Health Foundation- Groote Schuur Hospital/J52

    Cape Town, Western Cape, 7925, South Africa

  • Isipingo CRS

    Isipingo, KwaZulu-Natal, 4110, South Africa

  • Perinatal HIV Research Unit (PHRU)

    Soweto, Gauteng, 1862, South Africa

  • Setshaba Research Centre CRS

    Soshanguve, Gauteng, 0152, South Africa

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