NCT05168813CompletedPhase 2/3
Efficacy Study of COVID-19 mRNA Vaccine in Regions With SARS-CoV-2 Variants of Concern
Multi-Center, Randomized, Efficacy Study of COVID-19 mRNA Vaccine in Regions With SARS-CoV-2 Variants of Concern
Source: ClinicalTrials.gov · Last updated 21 Apr 2026
Brief summary (registry, in English)
The study will evaluate the clinical efficacy of different dosing regimens of the Moderna COVID-19 mRNA vaccine (100 mcg) in preventing COVID-19 disease in people who are living with HIV or have comorbidities associated with elevated risk of severe COVID-19, with the different vaccine regimens assessed determined by whether the participant had evidence of prior SARS-CoV-2 infection at enrollment.
- Status (registry)
- Completed
- Phase (registry)
- Phase 2/3
- Study type
- Interventional
- Enrollment
- 14237 (actual)
- First submitted
- 21 Dec 2021
- Start date
- 1 Dec 2021
- Primary completion date
- 19 Apr 2024
- Lead sponsor
- COVID-19 Prevention Network
- Diseases
- HIV
- NCT number
- NCT05168813
What you commit to
- Study type: Interventional · Phase 2/3
- Participants enrolled: 14237
- From 1 Dec 2021 to the primary completion date, 19 Apr 2024
- 47 sites in 7 countries
- Visits and tests: ask the trial team, the registry does not list them
Built from the registry fields of ClinicalTrials.gov. It describes the study, not your situation.
Who cannot take part
Copied verbatim from ClinicalTrials.gov and grouped by topic. Only the trial team decides who can take part.
Prior treatment
- Acutely ill 72 hours prior to or at screening. Participants meeting this criterion may be rescheduled within the relevant window periods. Participants with minor illnesses can be enrolled at the discretion of the investigator.
- Prior receipt of a SARS-CoV-2 vaccine.
- Live attenuated vaccines received within 30 days before first vaccination (eg, measles, mumps, and rubella \[MMR\]; oral polio vaccine \[OPV\]; varicella; yellow fever; live attenuated influenza vaccine, live attenuated zoster vaccine).
- Any vaccines that are not live attenuated vaccines and were received within 14 days prior to first vaccination (eg, tetanus, human papilloma virus (HPV), pneumococcal, Hepatitis A or B).
- Blood products, systemic immunoglobulins, or monoclonal antibodies (including against SARS-CoV-2) received within 90 days before first vaccination.
Other illness
- History of angioedema or anaphylaxis.
- Vaccines and other injections
Lab values
- History of severe allergic reaction to any ingredient of this vaccine (lipids (SM-102, polyethylene glycol \[PEG\] 2000 dimyristoyl glycerol \[DMG\], cholesterol, and 1,2-distearoyl-sn-glycero-3-phosphocholine \[DSPC\]), tromethamine, tromethamine hydrochloride, acetic acid, sodium acetate trihydrate, and sucrose).
Other
- General
Who the study is looking for
- General and Demographic Criteria
- Age ≥ 18 years if participant self-reports living with HIV or another comorbidity known to be associated with severe COVID-19, for example (CDC.gov for exhaustive list):
- Hypertension
- Type 2 diabetes mellitus
- Overweight, obese, or severely obese (ie, body mass index \[BMI\] ≥ 25 kg/m2)
- Heart conditions, such as heart failure, coronary artery disease, or cardiomyopathies
- Chronic kidney disease
- COPD (chronic obstructive pulmonary disease)
- Cancer
- Non-HIV immunocompromised state (weakened immune system) or solid organ transplant
- Pregnancy
- Sickle cell disease
- Smoking
- Willingness to be followed and remain in the catchment area for the planned duration of the study.
- Ability and willingness to provide informed consent.
- Willingness to discuss HIV infection status, undergo related testing/monitoring labs, and receive counseling and referrals to minimize HIV acquisition/improve HIV care as appropriate based on their infection status.
- Assessment of Understanding (AoU): Participant demonstrates understanding of this study; completes a questionnaire prior to first vaccination with demonstration of understanding of all questionnaire items answered incorrectly.
- Agrees not to enroll in another interventional study of an investigational research agent until after the study is completed and all the data has been obtained. Enrollment in studies of investigational research agents for the treatment of COVID-19 is allowed for participants who develop COVID-19 disease.
Age in the registry: 18 years to - · Sex: All · Does not accept healthy volunteers
Sites (47)
Sites in registry order. Pick your city on the disease page to sort them by distance.
| Site | City | Country | Site status |
|---|---|---|---|
| Gaborone CRS Coordinator of this site? Confirm its status | Gaborone | Botswana | Unknown status |
| Moi University Clinical Research Centre Coordinator of this site? Confirm its status | Eldoret | Kenya | Unknown status |
| Kisumu - Kombewa CRS Coordinator of this site? Confirm its status | Kisumu | Kenya | Unknown status |
| Kisumu Crs Coordinator of this site? Confirm its status | Kisumu | Kenya | Unknown status |
| Blantyre CRS Coordinator of this site? Confirm its status | Blantyre | Malawi | Unknown status |
| Malawi CRS Coordinator of this site? Confirm its status | Lilongwe | Malawi | Unknown status |
| Eswatini Prevention Center CRS Coordinator of this site? Confirm its status | Mbabane | Eswatini | Unknown status |
| UVRI-IAVI HIV Vaccine Program LTD. CRS Coordinator of this site? Confirm its status | Entebbe | Uganda | Unknown status |
| MU-JHU Research Collaboration CRS Coordinator of this site? Confirm its status | Kampala | Uganda | Unknown status |
| Baylor-Uganda CRS Coordinator of this site? Confirm its status | Kampala | Uganda | Unknown status |
| Joint Clinical Research Centre Coordinator of this site? Confirm its status | Kampala | Uganda | Unknown status |
| Josha Resarch CRS Coordinator of this site? Confirm its status | Bloemfontein | South Africa | Unknown status |
| Groote Schuur HIV CRS Coordinator of this site? Confirm its status | Cape Town | South Africa | Unknown status |
| Masiphumelele Clinical Research Site (MASI) CRS Coordinator of this site? Confirm its status | Cape Town | South Africa | Unknown status |
| FAM-CRU (Family Clinical Research Unit) Coordinator of this site? Confirm its status | Cape Town | South Africa | Unknown status |
| Univeristy of Cape Town Lung CRS Institute Coordinator of this site? Confirm its status | Cape Town | South Africa | Unknown status |
| TASK Central Coordinator of this site? Confirm its status | Cape Town | South Africa | Unknown status |
| Emavundleni CRS Coordinator of this site? Confirm its status | Cape Town | South Africa | Unknown status |
| Tongaat CRS Coordinator of this site? Confirm its status | Durban | South Africa | Unknown status |
| CAPRISA eThekwini CRS Coordinator of this site? Confirm its status | Durban | South Africa | Unknown status |
| Vulindlela CRS Coordinator of this site? Confirm its status | Durban | South Africa | Unknown status |
| Synergy Biomed Research Institute Coordinator of this site? Confirm its status | East London | South Africa | Unknown status |
| Ndlovu Research Centre CoVPN CRS Coordinator of this site? Confirm its status | Elandsdoorn | South Africa | Unknown status |
| MeCRU CRS Coordinator of this site? Confirm its status | Ga-Rankuwa | South Africa | Unknown status |
| Task Eden Coordinator of this site? Confirm its status | George | South Africa | Unknown status |
| Isipingo CRS Coordinator of this site? Confirm its status | Isipingo | South Africa | Unknown status |
| Clinical HIV Research Unit (CHRU)/ Helen Joseph CRS Coordinator of this site? Confirm its status | Johannesburg | South Africa | Unknown status |
| Newtown Clinical Research Coordinator of this site? Confirm its status | Johannesburg | South Africa | Unknown status |
| Kliptown Soweto CRS Coordinator of this site? Confirm its status | Johannesburg | South Africa | Unknown status |
| Wits RHI Ward 21 CRS Coordinator of this site? Confirm its status | Johannesburg | South Africa | Unknown status |
| Soweto - Bara CRS Coordinator of this site? Confirm its status | Johannesburg | South Africa | Unknown status |
| Aurum Institute Klerksdorp CRS Coordinator of this site? Confirm its status | Klerksdorp | South Africa | Unknown status |
| PHRU Matlosana CRS Coordinator of this site? Confirm its status | Klerksdorp | South Africa | Unknown status |
| Qhakaza Mbokodo Research Clinic CRS Coordinator of this site? Confirm its status | Ladysmith | South Africa | Unknown status |
| MERC Middelburg Coordinator of this site? Confirm its status | Middelburg | South Africa | Unknown status |
| Nelson Mandela Academic Research Unit CRS Coordinator of this site? Confirm its status | Mthatha | South Africa | Unknown status |
| PHOENIX Pharma (Pty) Ltd Coordinator of this site? Confirm its status | Port Elizabeth | South Africa | Unknown status |
| MERC Kempton Park Coordinator of this site? Confirm its status | Pretoria | South Africa | Unknown status |
| Synexus Stanza Clinical Research Centre (CRS) Coordinator of this site? Confirm its status | Pretoria | South Africa | Unknown status |
| Rustenburg CRS Coordinator of this site? Confirm its status | Rustenburg | South Africa | Unknown status |
| Synexus Helderberg Coordinator of this site? Confirm its status | Stellenbosch | South Africa | Unknown status |
| Tembisa Clinic 4 CoVPN CRS Coordinator of this site? Confirm its status | Tembisa | South Africa | Unknown status |
| MERC Welkom Coordinator of this site? Confirm its status | Welkom | South Africa | Unknown status |
| Matero Reference Clinic CRS Coordinator of this site? Confirm its status | Lusaka | Zambia | Unknown status |
| UNC Global Projects / Kamwala District Health Centre Coordinator of this site? Confirm its status | Lusaka | Zambia | Unknown status |
| Cfhrz Crs Coordinator of this site? Confirm its status | Lusaka | Zambia | Unknown status |
| Zambia Emory HIV Research Project - Ndola CoVPN CRS Coordinator of this site? Confirm its status | Ndola | Zambia | Unknown status |
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This page is information, not medical advice. Discuss any trial with your doctor.