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COVID-19Phase 1/2NCT05370040

THEMBA II T-Cell Vaccine: Vaccination With saRNA COVID-19 Vaccines

A Phase 1/2 study testing AAHI-SC2 Vaccine, AAHI-SC3 Vaccine and EUA or approved vaccine in people with COVID-19, run by ImmunityBio, Inc. at 1 site in South Africa.

Terminated

Stopped early. The study ended before it was planned to and will not resume.

Official record
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Trial summary

This is a phase 1/2 open-label study assessing the safety, reactogenicity, and immunogenicity of saRNA COVID-19 boost vaccines in participants that have been previously vaccinated against or previously infected with COVID-19. Read more about this study

Who is it for?
Ages 18 to 55 yearsHealthy volunteers can take part
Conditions the study is for
COVID-19
What is being tested?
AAHI-SC2 Vaccine, AAHI-SC3 Vaccine and EUA or approved vaccine
Type of treatment
Vaccines
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
60 participants
Where
1 siteSouth Africa
Study dates
5 May 2022to 11 Mar 2024
Phase
Phase 1/2
Are there results?
Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 55 years
  • All sexes
  • Healthy volunteers accepted
  • Adult

Who may be able to join

  • Healthy adults ≥ 18 years of age at time of enrollment.
  • Vaccinated with an EUA or approved vaccine against COVID-19 ≥ 3 months prior to enrollment on study or infection with COVID-19 ≥ 3 months prior to enrollment on study.
  • Able to understand and provide a signed informed consent that fulfills the relevant Institutional Review Board (IRB) or Independent Ethics Committee (IEC) guidelines.
  • Agrees to the collection of biospecimens (eg, nasopharyngeal [NP] swabs) and venous blood per protocol.
  • Ability to attend required study visits and return for adequate follow-up, as required by this protocol.
  • Temperature < 38°C.
  • Agreement to practice effective contraception for female participants of childbearing potential and non-sterile males. Female participants of childbearing potential must agree to use effective contraception while on study until at least 1 month after the last dose of vaccine. Non-sterile male participants must agree to use a condom while on study until at least 1 month after the last dose of vaccine. Effective contraception includes surgical sterilization (eg, vasectomy, tubal ligation), two forms of barrier methods (eg, condom, diaphragm), intrauterine devices (IUDs), oral contraceptives, injectable contraceptives, patches, implants and abstinence.
  • HIV-positive participants must have been on anti-retroviral therapy for ≥ 4 weeks and have HIV-1 viral load < 1,000 copies/mL at the time of enrollment.

Who cannot join

  • Serious adverse reaction to any vaccine, any unrelated medication or any component of the investigational vaccine, including a history of anaphylaxis and symptoms of a severe allergic reaction and history of allergies in the past.
  • Confirmed current COVID-19, previous SARS-CoV-2 infection in the last < 3 months, or PCR positive for SARS-CoV-2 at screening.
  • Vaccinated with an EAU-approved vaccine against COVID-19 in the last < 3 months.
  • Pregnant or breastfeeding women.
  • Chronic lung disease (included COPD) as evidenced by one or more exacerbations requiring a course of steroids in the last year, or the requiring chronic low dose oral steroids to prevent exacerbations. Uncontrolled asthma, defined as requiring reliever inhaler (short-acting beta agonist or ipratromium bromide) more than twice a week is also excluded.
  • Bone marrow or organ transplant recipient
Show all 17Show fewer
  • Extreme obesity (defined as BMI of 40 kg/m2 or higher).
  • Chronic kidney disease requiring dialysis.
  • History of liver disease.
  • Any disease associated with acute fever, or any infection.
  • Participants with acquired or hereditary immunodeficiencies other than well-controlled HIV are excluded from enrollment.
  • Current diagnosis of active tuberculosis.
  • History of hereditary, idiopathic or acquired angioedema.
  • No spleen or functional asplenia.
  • Chronic use (more than 14 continuous days) of any medications that may be associated with impaired immune responsiveness including, but not limited to, systemic corticosteroids exceeding 10 mg/day of prednisone equivalent, allergy injections, immunoglobulin, interferon, or immunomodulators. The use of low dose topical, ophthalmic, inhaled and intranasal steroid preparations will be permitted.
  • According to the judgement of the investigator any medical, psychiatric, psychological, social, occupational or other conditions that could affect the participants ability to sign informed consent, provide safety assessment data or comply with the requirements of the study protocol.
  • Assessed by the Investigator to be unable or unwilling to comply with the requirements of the protocol.

Trial locations and contacts

1 site in 1 country.

South Africa1 site
  • Wits Vida

    Johannesburg

Other trials in South Africa

About this study

Official title: THEMBA II T-CELL Vaccine: A Phase 1/2 Study of the Safety, Reactogenicity, and Immunogenicity of Vaccination With saRNA COVID-19 Vaccines

This is a phase 1/2 open-label study assessing the safety, reactogenicity, and immunogenicity of saRNA COVID-19 boost vaccines in participants that have been previously vaccinated against or previously infected with COVID-19.

Conditions
COVID-19
Being tested
AAHI-SC2 Vaccine, AAHI-SC3 Vaccine, EUA or approved vaccine
Medical subject headings
COVID-19

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • AAHI-SC2 VaccineBiological

    AAHI -SC2 self-amplifying RNA (saRNA) against SARS-CoV-2 Spike protein delivered by nanostructured lipid carrier (NLC) Vaccine

  • AAHI-SC3 VaccineBiological

    AAHI-SC3 self-amplifying RNA (saRNA) against SARS-CoV-2 Spike and nucleocapsid protein delivered by nanostructured lipid carrier (NLC) Vaccine

  • EUA or approved vaccineBiological

    Janssen or Pfizer vaccines (control arm)

Study groups in NCT05370040
Study groupRoleWhat they receive
Phase 1 Cohort 1AExperimentalAAHI-SC2 on Day 1 at dosage 25 μg IM
Receives: Biological: AAHI-SC2 Vaccine
Phase 1 Cohort 1BExperimentalAAHI-SC2 on Day 1 at dosage 50 μg IM
Receives: Biological: AAHI-SC2 Vaccine
Phase 1 Cohort 1CExperimentalAAHI-SC2 on Day 1 at dosage 70 μg IM
Receives: Biological: AAHI-SC2 Vaccine
Phase 1 Cohort 2AExperimentalAAHI-SC3 on Day 1 at dosage 25 μg IM
Receives: Biological: AAHI-SC3 Vaccine
Phase 1 Cohort 2BExperimentalAAHI-SC3 on Day 1 at dosage 50 μg IM
Receives: Biological: AAHI-SC3 Vaccine
Phase 1 Cohort 2CExperimentalAAHI-SC3 on Day 1 at dosage 85 μg IM
Receives: Biological: AAHI-SC3 Vaccine
Phase 2 Control armPlacebo comparatorEUA or approved vaccine on Day 1
Receives: Biological: EUA or approved vaccine
Phase 2 Experimental arm 1ExperimentalAAHI-SC2 on Day 1 Dose TBD as determined in phase 1 study
Receives: Biological: AAHI-SC2 Vaccine
Phase 2 Experimental arm 2ExperimentalAAHI-SC3 on Day 1 Dose TBD as determined in phase 1 study
Receives: Biological: AAHI-SC3 Vaccine
Phase 2 Experimental arm 3ExperimentalAAHI-SC3 on Day 1 and 29 Dose TBD as determined in phase 1 study
Receives: Biological: AAHI-SC3 Vaccine

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Phase 1 Safety - Incidence of MAAEs Through 1 Week

    Incidence of medically-attended adverse events (MAAEs)

    Measured: through 1 week post final vaccine administration

  2. Phase 1 Safety - Incidence of MAAEs Through 30 Days

    Incidence of MAAEs

    Measured: through 30 days post final vaccine administration

  3. Phase 1 Safety - Incidence of MAAEs Through 6 Months

    Incidence of MAAEs

    Measured: through 6 months post final vaccine administration

  4. Phase 1 Safety - Incidence of Solicited Local Reactogenicity AEs

    Incidence and severity of solicited local reactogenicity AEs

    Measured: through 1 week after each vaccine dose

  5. Phase 1 Safety - Incidence of Solicited Systemic Reactogenicity AEs

    Incidence and severity of solicited systemic reactogenicity AEs

    Measured: through 1 week after each vaccine dose

  6. Phase 1 Safety - Incidence of Unsolicited AEs Through 1 Week

    Incidence and severity of unsolicited AEs

    Measured: through 1 week post final vaccine administration

  7. Phase 1 Safety - Incidence of Unsolicited AEs Through 30 Days

    Incidence and severity of unsolicited AEs

    Measured: through 30 days post final vaccine administration

  8. Phase 1 Safety - Incidence of SAEs Through 1 Week

    Incidence of serious adverse events (SAEs)

    Measured: through 1 week post final vaccine administration

  9. Phase 1 Safety - Incidence of SAEs Through 30 Days

    Incidence of SAEs

    Measured: through 30 days post final vaccine administration

  10. Phase 1 Safety - Incidence of SAEs Through 6 Months

    Incidence of SAEs

    Measured: through 6 months post final vaccine administration

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted11 May 2022
  2. Study start5 May 2022
  3. Primary completion11 Mar 2024
  4. Study completion11 Mar 2024

Why it stopped: Discontinued prior to enroll in Phase 2

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 1/2
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Sequential
Model description
Open label 6 Cohort Phase 1 Study leading to Randomized 4 Cohort Phase 2 Study
Masking
Triple blind
Who is masked
Participant, Care provider, Investigator
Enrolment
60 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT05370040
Sponsor's protocol ID
COVID-4.015
Status last verified
Feb 2025
First submitted
9 May 2022
Last updated
11 Mar 2025
Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No

Questions about this trial

What is this clinical trial studying?

A Phase 1/2 study testing AAHI-SC2 Vaccine, AAHI-SC3 Vaccine and EUA or approved vaccine in people with COVID-19, run by ImmunityBio, Inc. at 1 site in South Africa.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 8 inclusion and 17 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: stopped early, as of the sponsor's last update on 11 Mar 2025. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in South Africa. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this combined phase mean?

Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

Yes. Results are posted in the registry (first posted 1 May 2024). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Phase 1 Safety - Incidence of MAAEs Through 1 Week (time frame: through 1 week post final vaccine administration). The study lists 10 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 11 Mar 2025.

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