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.
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
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- 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.
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 group | Role | What they receive |
|---|---|---|
| Phase 1 Cohort 1A | Experimental | AAHI-SC2 on Day 1 at dosage 25 μg IM Receives: Biological: AAHI-SC2 Vaccine |
| Phase 1 Cohort 1B | Experimental | AAHI-SC2 on Day 1 at dosage 50 μg IM Receives: Biological: AAHI-SC2 Vaccine |
| Phase 1 Cohort 1C | Experimental | AAHI-SC2 on Day 1 at dosage 70 μg IM Receives: Biological: AAHI-SC2 Vaccine |
| Phase 1 Cohort 2A | Experimental | AAHI-SC3 on Day 1 at dosage 25 μg IM Receives: Biological: AAHI-SC3 Vaccine |
| Phase 1 Cohort 2B | Experimental | AAHI-SC3 on Day 1 at dosage 50 μg IM Receives: Biological: AAHI-SC3 Vaccine |
| Phase 1 Cohort 2C | Experimental | AAHI-SC3 on Day 1 at dosage 85 μg IM Receives: Biological: AAHI-SC3 Vaccine |
| Phase 2 Control arm | Placebo comparator | EUA or approved vaccine on Day 1 Receives: Biological: EUA or approved vaccine |
| Phase 2 Experimental arm 1 | Experimental | AAHI-SC2 on Day 1 Dose TBD as determined in phase 1 study Receives: Biological: AAHI-SC2 Vaccine |
| Phase 2 Experimental arm 2 | Experimental | AAHI-SC3 on Day 1 Dose TBD as determined in phase 1 study Receives: Biological: AAHI-SC3 Vaccine |
| Phase 2 Experimental arm 3 | Experimental | AAHI-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.
Phase 1 Safety - Incidence of MAAEs Through 1 Week
Incidence of medically-attended adverse events (MAAEs)
Measured: through 1 week post final vaccine administration
Phase 1 Safety - Incidence of MAAEs Through 30 Days
Incidence of MAAEs
Measured: through 30 days post final vaccine administration
Phase 1 Safety - Incidence of MAAEs Through 6 Months
Incidence of MAAEs
Measured: through 6 months post final vaccine administration
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
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
Phase 1 Safety - Incidence of Unsolicited AEs Through 1 Week
Incidence and severity of unsolicited AEs
Measured: through 1 week post final vaccine administration
Phase 1 Safety - Incidence of Unsolicited AEs Through 30 Days
Incidence and severity of unsolicited AEs
Measured: through 30 days post final vaccine administration
Phase 1 Safety - Incidence of SAEs Through 1 Week
Incidence of serious adverse events (SAEs)
Measured: through 1 week post final vaccine administration
Phase 1 Safety - Incidence of SAEs Through 30 Days
Incidence of SAEs
Measured: through 30 days post final vaccine administration
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.
- First posted11 May 2022
- Study start5 May 2022
- Primary completion11 Mar 2024
- Study completion11 Mar 2024
Why it stopped: Discontinued prior to enroll in Phase 2
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Posted resultsParticipant flow, outcome measures and adverse events reported by the sponsor.
- Other trials for COVID-19Studies of the same condition, open and under way.
- More trials run by ImmunityBio, Inc.The sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
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)
Sponsor and investigators
- Lead sponsor
- ImmunityBio, Inc.
- Sponsor type
- Industry (pharma, biotech, devices)
- Responsible party
- Sponsor
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
- Results posted
- Yes, on ClinicalTrials.gov
- Data monitoring committee
- No
- FDA-regulated drug
- Yes
- FDA-regulated device
- No
Study at a glance
From the registry record, last updated by the sponsor on 11 Mar 2025. Recruitment status is as the sponsor reported it: confirm with the study team.
- 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
- ClinicalTrials.gov ID
- NCT05370040
- Acronym / sponsor ID
- COVID-4.015
- Conditions
- COVID-19
- Phase
- Phase 1/2
- Study type
- Interventional
- Recruitment status
- TerminatedReason stopped: Discontinued prior to enroll in Phase 2
- Enrolment
- 60 participants (actual)
- Lead sponsor
- ImmunityBio, Inc.Industry (pharma, biotech, devices)
- Study start
- 5 May 2022 (actual)
- Primary completion
- 11 Mar 2024 (actual)
- Study completion
- 11 Mar 2024 (actual)
- First posted
- 11 May 2022 (actual)
- Results
- Posted 1 May 2024
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
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.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Sequential
- Masking
- Triple blind (participant, care provider, investigator)
- Number of arms
- 10
- Model description
- Open label 6 Cohort Phase 1 Study leading to Randomized 4 Cohort Phase 2 Study
| Arm | Type | Receives |
|---|---|---|
| Phase 1 Cohort 1A | Experimental | Biological: AAHI-SC2 VaccineAAHI-SC2 on Day 1 at dosage 25 μg IM |
| Phase 1 Cohort 1B | Experimental | Biological: AAHI-SC2 VaccineAAHI-SC2 on Day 1 at dosage 50 μg IM |
| Phase 1 Cohort 1C | Experimental | Biological: AAHI-SC2 VaccineAAHI-SC2 on Day 1 at dosage 70 μg IM |
| Phase 1 Cohort 2A | Experimental | Biological: AAHI-SC3 VaccineAAHI-SC3 on Day 1 at dosage 25 μg IM |
| Phase 1 Cohort 2B | Experimental | Biological: AAHI-SC3 VaccineAAHI-SC3 on Day 1 at dosage 50 μg IM |
| Phase 1 Cohort 2C | Experimental | Biological: AAHI-SC3 VaccineAAHI-SC3 on Day 1 at dosage 85 μg IM |
| Phase 2 Control arm | Placebo comparator | Biological: EUA or approved vaccineEUA or approved vaccine on Day 1 |
| Phase 2 Experimental arm 1 | Experimental | Biological: AAHI-SC2 VaccineAAHI-SC2 on Day 1 Dose TBD as determined in phase 1 study |
| Phase 2 Experimental arm 2 | Experimental | Biological: AAHI-SC3 VaccineAAHI-SC3 on Day 1 Dose TBD as determined in phase 1 study |
| Phase 2 Experimental arm 3 | Experimental | Biological: AAHI-SC3 VaccineAAHI-SC3 on Day 1 and 29 Dose TBD as determined in phase 1 study |
Who may qualify
- Ages
- 18 to 55 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult
Key inclusion criteria (8 listed)
- 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.
Key exclusion criteria (17 listed)
- 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.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| AAHI-SC2 VaccineAAHI -SC2 self-amplifying RNA (saRNA) against SARS-CoV-2 Spike protein delivered by nanostructured lipid carrier (NLC) Vaccine | Biological | Phase 1 Cohort 1A, Phase 1 Cohort 1B, Phase 1 Cohort 1C, Phase 2 Experimental arm 1 |
| AAHI-SC3 VaccineAAHI-SC3 self-amplifying RNA (saRNA) against SARS-CoV-2 Spike and nucleocapsid protein delivered by nanostructured lipid carrier (NLC) Vaccine | Biological | Phase 1 Cohort 2A, Phase 1 Cohort 2B, Phase 1 Cohort 2C, Phase 2 Experimental arm 2, Phase 2 Experimental arm 3 |
| EUA or approved vaccineJanssen or Pfizer vaccines (control arm) | Biological | Phase 2 Control arm |
Primary outcome
Phase 1 Safety - Incidence of MAAEs Through 1 Week
Time frame: through 1 week post final vaccine administration
Incidence of medically-attended adverse events (MAAEs)
Phase 1 Safety - Incidence of MAAEs Through 30 Days
Time frame: through 30 days post final vaccine administration
Incidence of MAAEs
Phase 1 Safety - Incidence of MAAEs Through 6 Months
Time frame: through 6 months post final vaccine administration
Incidence of MAAEs
Phase 1 Safety - Incidence of Solicited Local Reactogenicity AEs
Time frame: through 1 week after each vaccine dose
Incidence and severity of solicited local reactogenicity AEs
Phase 1 Safety - Incidence of Solicited Systemic Reactogenicity AEs
Time frame: through 1 week after each vaccine dose
Incidence and severity of solicited systemic reactogenicity AEs
Phase 1 Safety - Incidence of Unsolicited AEs Through 1 Week
Time frame: through 1 week post final vaccine administration
Incidence and severity of unsolicited AEs
Phase 1 Safety - Incidence of Unsolicited AEs Through 30 Days
Time frame: through 30 days post final vaccine administration
Incidence and severity of unsolicited AEs
Phase 1 Safety - Incidence of SAEs Through 1 Week
Time frame: through 1 week post final vaccine administration
Incidence of serious adverse events (SAEs)
Phase 1 Safety - Incidence of SAEs Through 30 Days
Time frame: through 30 days post final vaccine administration
Incidence of SAEs
Phase 1 Safety - Incidence of SAEs Through 6 Months
Time frame: through 6 months post final vaccine administration
Incidence of SAEs
Results and safety
Loading the posted results from ClinicalTrials.gov…
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 11 Mar 2025.
- Posted resultsParticipant flow, baseline, all outcome measures and adverse events.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
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.