Phase 3
N=5,404
Pivotal Phase 2b/3 ALVAC/Bivalent gp120/MF59 HIV Vaccine Prevention Safety and Efficacy Study in South Africa
HIV Infections
Bottom Line
View on ClinicalTrials.gov: NCT02968849 ↗Enrolled (actual)
5,404
Serious AEs
3.7%
Results posted
Feb 2023
Primary outcome: Primary: Incidence Rate of HIV-1 Infection Diagnosed After Enrollment (Concurrent With First Vaccination) Through 24 Months After Enrollment — 0.034; 0.033; 0.034; 0.033 events per 100 person-years — p=0.84
Study Design & Population
- Study type
- Interventional
- Phase
- Phase 3
- Interventions
- ALVAC-HIV (vCP2438) (Biological); Bivalent Subtype C gp120/MF59 (Biological); Placebo (Biological)
- Age
- Adult · 18+ yrs
- Sex
- All
- Sponsor
- National Institute of Allergy and Infectious Diseases (NIAID)
- Primary completion
- Nov 2021
Outcome Measures
| Outcome | Result | p-value |
|---|---|---|
| PRIMARY Incidence Rate of HIV-1 Infection Diagnosed After Enrollment (Concurrent With First Vaccination) Through 24 Months After Enrollment |
0.034; 0.033; 0.034; 0.033 | 0.84 |
| PRIMARY Number of Participants Reporting Local Reactogenicity Signs and Symptoms: Pain and/or Tenderness |
2161; 2539; 480; 149; 62; 12 | — |
| PRIMARY Number of Participants Reporting Local Reactogenicity Signs and Symptoms: Erythema and/or Induration |
2494; 2683; 108; 14; 74; 3 | — |
| PRIMARY Number of Participants Reporting Systemic Reactogenicity Signs and Symptoms |
2622; 2649; 75; 40; 7; 11 | — |
| PRIMARY Number of Participants Reporting Adverse Events (AEs), by Relationship to Study Product |
38; 12; 1689; 1722; 977; 966 | — |
| PRIMARY Number of Participants Reporting Adverse Events (AEs), by Severity Grade |
161; 137; 1443; 1472; 98; 103 | — |
| PRIMARY Number of Participants Reporting Serious Adverse Events (SAEs) |
103; 95; 1624; 1639; 977; 966 | — |
| PRIMARY Number of Participants Reporting Adverse Events of Special Interest (AESIs) |
4; 2; 1693; 1700; 1007; 998 | — |
| PRIMARY Number of Participants Reporting New Chronic Medical Conditions |
54; 54; 1673; 1680; 977; 966 | — |
| PRIMARY Number of Participants With Early Study Termination Associated With an AE or Reactogenicity |
9; 14; 140; 129; 2555; 2557 | — |
| PRIMARY Number of Participants With Study Product Discontinuation Associated With an AE or Reactogenicity |
8; 6; 4; 1; 539; 598 | — |
| PRIMARY Incidence Rate of HIV-1 Infections Diagnosed Following Enrollment and Throughout All Participant Follow-Up |
0.032; 0.03; 0.038; 0.03 | 0.66 |
| SECONDARY Incidence Rate of HIV-1 Infection Diagnosed After Enrollment Through 36 Months Post Enrollment |
— | — |
| SECONDARY Incidence Rate of HIV-1 Infection Diagnosed After Month 6.5 Through 24 Months Post Enrollment |
0.03; 0.026; 0.03; 0.026 | 0.39 |
| SECONDARY Number of Participants With Occurrence of CD4+ and CD8+ T-Cells Expressing IFN-g and/or IL-2 in Response to HIV Proteins Included in the Vaccine at Month 6.5 |
65; 0; 88; 0; 89; 0 | — |
| SECONDARY Number of Participants With Occurrence of CD4+ and CD8+ T-Cells Expressing IFN-g and/or IL-2 and/or CD40L in Response to HIV Proteins Included in the Vaccine at Month 6.5 |
86; 0; 103; 0; 103; 0 | — |
| SECONDARY Level of CD4+ and CD8+ T-Cells Expressing IFN-g and/or IL-2 in Response to HIV Proteins Included in the Vaccine at Month 6.5 |
0.1; 0.1; 0.2; 0.1; 0.1; 0.1 | — |
| SECONDARY Level of CD4+ and CD8+ T-Cells Expressing IFN-g and/or IL-2 and/or CD40L in Response to HIV Proteins Included in the Vaccine at Month 6.5 |
0.2; 0.2; 0.2; 0.1; 0.2; 0.2 | — |
| SECONDARY Number of Participants With Occurrence of Vaccine-induced IgG Binding Antibodies to HIV Proteins at Month 6.5 |
117; 0; 116; 0; 117; 0 | — |
| SECONDARY Number of Participants With Occurrence of Vaccine-induced IgG3 Binding Antibodies to HIV Proteins at Month 6.5 |
74; 0; 106; 0; 87; 0 | — |
| SECONDARY Number of Participants With Occurrence of Vaccine-induced IgA Binding Antibodies to HIV Proteins at Month 6.5 |
0; 0; 0; 0; 0; 0 | — |
| SECONDARY Level of Vaccine-induced IgG Binding Antibodies to HIV Proteins at Month 6.5 |
20132; 10290; 7503.5; 3708.5; 12765; 6247.2 | — |
| SECONDARY Level of Vaccine-induced IgG3 Binding Antibodies to HIV Proteins at Month 6.5 |
277.1; 369.5; 302.2; 318.5; 843; 337.8 | — |
| SECONDARY Level of Vaccine-induced IgA Binding Antibodies to HIV Proteins at Month 6.5 |
1521.5; 1024.8; 2511.9; 801.2; 3140.2; 2149.8 | — |
| SECONDARY Incidence Rate of HIV-1 Infection Diagnosed After Enrollment Through 24 Months Among Female Participants |
0.043; 0.042 | 0.82 |
| SECONDARY Incidence Rate of HIV-1 Infection Diagnosed After Enrollment Through 24 Months Among Male Participants |
0.013; 0.013 | 0.98 |
| SECONDARY Incidence Rate of HIV-1 Infection Diagnosed After Enrollment Through 24 Months Among Female Participants Aged 25 or Younger |
0.047; 0.044 | 0.60 |
| SECONDARY Incidence Rate of HIV-1 Infection Diagnosed After Enrollment Through 24 Months Among Female Participants Older Than 25 |
0.035; 0.039 | 0.71 |
| SECONDARY Incidence Rate of HIV-1 Infection Diagnosed After Enrollment Through Month 24 by Genotypic Characteristics of Viral Sequences From HIV-1 Infected Participants at HIV-1 Diagnosis, Such As Signature Site Mutations |
— | — |
| SECONDARY Number of Participants With Viral Sequences at HIV-1 Diagnosis |
119; 115 | — |
Summary
This study will evaluate the preventive vaccine efficacy, safety, and tolerability of ALVAC-HIV (vCP2438) + Bivalent Subtype C gp120/MF59 in HIV-seronegative South African adults over 24 months and potentially up to 36 months from enrollment.
Eligibility Criteria
Inclusion Criteria
- Age of 18 to 35 years
- Sexually active, defined as having had sexual intercourse at least twice in the past 30 days prior to screening, and is considered by the site staff to be at risk for HIV infection.
- Access to a participating HVTN CRS and willingness to be followed for the planned duration of the study
- Ability and willingness to provide informed consent
- Assessment of understanding: volunteer demonstrates understanding of this study prior to first vaccination with verbal demonstration of understanding of all questions.
- Agrees not to enroll in another study of an investigational research agent until the participant is unblinded or their study participation ends, whichever occurs last
- Good general health as shown by medical history, physical exam, and screening laboratory tests
- Willingness to receive HIV test results
- Willingness to discuss HIV infection risks and willing to receive HIV risk reduction counseling.
- Alanine aminotransferase (ALT) < 2.5 times the institutional upper limit of normal
- Negative HIV-1 and -2 blood test within 30 days prior to enrollment: Sites may use locally available assays that have been approved by HVTN Laboratory Operations.
- Volunteers who were born female: negative serum or urine beta human chorionic gonadotropin (β-HCG) pregnancy test performed prior to vaccination on the day of initial vaccination. Persons who are NOT of reproductive potential due to having undergone total hysterectomy or bilateral oophorectomy (verified by medical records), are not required to undergo pregnancy testing.
- Reproductive status: A volunteer who was born female must:
- Agree to consistently use effective contraception (Appendix B and Appendix C) for sexual activity that could lead to pregnancy from at least 21 days prior to enrollment through 3 months after the last vaccination. Effective contraception is defined as using 2 methods of birth control. These include 1 of the following methods:
- Condoms (male or female)
- Diaphragm or cervical cap
PLUS 1 of the following methods:
- Intrauterine device (IUD),
- Hormonal contraception (in accordance with applicable national contraception guidelines), or
- Successful vasectomy in the male partner (considered successful if a volunteer reports that a male partner has [1] documentation of azoospermia by microscopy, or [2] a vasectomy more than 2 years ago with no resultant pregnancy despite sexual activity postvasectomy), or
- Any other contraceptive method approved by the protocol safety review team;
- Or not be of reproductive potential, such as having been diagnosed with premature menopause (with no menses for 1 year) or having undergone hysterectomy, bilateral oophorectomy, or tubal ligation.
- Volunteers who were born female must also agree not to seek pregnancy through alternative methods, such as artificial insemination or in vitro fertilization until 3 months after the last vaccination
Exclusion Criteria
- Blood products received within 90 days before first vaccination
- Investigational research agents received within 30 days before first vaccination
- Intent to participate in another study of an investigational research agent or any other study that requires non-HVTN HIV antibody testing during the planned duration of the study
- Pregnant or breastfeeding
- HIV vaccine(s) received in a prior HIV vaccine trial. For volunteers who have received control/placebo in an HIV vaccine trial, the HVTN 702 PSRT will determine eligibility on a case-by-case basis.
- Non-HIV experimental vaccine(s) received within the last 5 years in a prior vaccine trial. Exceptions may be made for vaccines that have subsequently undergone licensure. For volunteers who have received control/placebo in an experimental vaccine trial, the protocol safety review team will determine eligibility on a case-by-case basis. For volunteers who have received an experimental vaccine(s) greater than 5 years ago, eligibility for enrollment will be determine
Data sourced from ClinicalTrials.gov (NCT02968849). Outcome figures and adverse-event rates are extracted automatically from the registry's posted results and are provided for clinician reference, not as a substitute for the primary publication.