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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

Full criteria on ClinicalTrials.gov

Sites (47)

Sites in registry order. Pick your city on the disease page to sort them by distance.

SiteCityCountrySite status
Gaborone CRS
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GaboroneBotswanaUnknown status
Moi University Clinical Research Centre
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EldoretKenyaUnknown status
Kisumu - Kombewa CRS
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KisumuKenyaUnknown status
Kisumu Crs
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KisumuKenyaUnknown status
Blantyre CRS
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BlantyreMalawiUnknown status
Malawi CRS
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LilongweMalawiUnknown status
Eswatini Prevention Center CRS
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MbabaneEswatiniUnknown status
UVRI-IAVI HIV Vaccine Program LTD. CRS
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EntebbeUgandaUnknown status
MU-JHU Research Collaboration CRS
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KampalaUgandaUnknown status
Baylor-Uganda CRS
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KampalaUgandaUnknown status
Joint Clinical Research Centre
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KampalaUgandaUnknown status
Josha Resarch CRS
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BloemfonteinSouth AfricaUnknown status
Groote Schuur HIV CRS
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Cape TownSouth AfricaUnknown status
Masiphumelele Clinical Research Site (MASI) CRS
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Cape TownSouth AfricaUnknown status
FAM-CRU (Family Clinical Research Unit)
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Cape TownSouth AfricaUnknown status
Univeristy of Cape Town Lung CRS Institute
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Cape TownSouth AfricaUnknown status
TASK Central
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Cape TownSouth AfricaUnknown status
Emavundleni CRS
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Cape TownSouth AfricaUnknown status
Tongaat CRS
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DurbanSouth AfricaUnknown status
CAPRISA eThekwini CRS
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DurbanSouth AfricaUnknown status
Vulindlela CRS
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DurbanSouth AfricaUnknown status
Synergy Biomed Research Institute
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East LondonSouth AfricaUnknown status
Ndlovu Research Centre CoVPN CRS
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ElandsdoornSouth AfricaUnknown status
MeCRU CRS
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Ga-RankuwaSouth AfricaUnknown status
Task Eden
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GeorgeSouth AfricaUnknown status
Isipingo CRS
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IsipingoSouth AfricaUnknown status
Clinical HIV Research Unit (CHRU)/ Helen Joseph CRS
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JohannesburgSouth AfricaUnknown status
Newtown Clinical Research
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JohannesburgSouth AfricaUnknown status
Kliptown Soweto CRS
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JohannesburgSouth AfricaUnknown status
Wits RHI Ward 21 CRS
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JohannesburgSouth AfricaUnknown status
Soweto - Bara CRS
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JohannesburgSouth AfricaUnknown status
Aurum Institute Klerksdorp CRS
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KlerksdorpSouth AfricaUnknown status
PHRU Matlosana CRS
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KlerksdorpSouth AfricaUnknown status
Qhakaza Mbokodo Research Clinic CRS
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LadysmithSouth AfricaUnknown status
MERC Middelburg
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MiddelburgSouth AfricaUnknown status
Nelson Mandela Academic Research Unit CRS
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MthathaSouth AfricaUnknown status
PHOENIX Pharma (Pty) Ltd
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Port ElizabethSouth AfricaUnknown status
MERC Kempton Park
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PretoriaSouth AfricaUnknown status
Synexus Stanza Clinical Research Centre (CRS)
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PretoriaSouth AfricaUnknown status
Rustenburg CRS
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RustenburgSouth AfricaUnknown status
Synexus Helderberg
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StellenboschSouth AfricaUnknown status
Tembisa Clinic 4 CoVPN CRS
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TembisaSouth AfricaUnknown status
MERC Welkom
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WelkomSouth AfricaUnknown status
Matero Reference Clinic CRS
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LusakaZambiaUnknown status
UNC Global Projects / Kamwala District Health Centre
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LusakaZambiaUnknown status
Cfhrz Crs
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LusakaZambiaUnknown status
Zambia Emory HIV Research Project - Ndola CoVPN CRS
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NdolaZambiaUnknown status

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This page is information, not medical advice. Discuss any trial with your doctor.