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mRNA-1189

Phase 1

Epstein-Barr Virus | Vaccine | Infectious Disease |Moderna, Inc.|Last Updated: May 6, 2026

Development status

Highest phase Phase 1
Registered trials 3 across 1 sponsor since Dec 2021

Success Probability

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Market & Valuation

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Trial Design

RandomizedCONTROLLED
Total Trials1
Total Enrollment120

FDA Designations

No designations recorded

Clinical trial landscape

mRNA-1189 · 2 trials · 2 indications

Phase 1 2
NCT07478952A Study of an Epstein-Barr Virus (EBV) Candidate Vaccine, mRNA-1189 in Healthy Adults 18 to 30 Years of AgeEpstein-Barr Virus
RECRUITING120 Analytics
NCT05164094A Study of an Epstein-Barr Virus (EBV) Candidate Vaccine, mRNA-1189, in 10- to 30-Year-Old Healthy Adolescents and AdultsEpstein-Barr Virus Infection
ACTIVE NOT_RECRUITING867 Analytics
PHASE1RECRUITING
A Study of an Epstein-Barr Virus (EBV) Candidate Vaccine, mRNA-1189 in Healthy Adults 18 to 30 Years of Age
Epstein-Barr VirusUnlock trial analytics
PHASE1ACTIVE NOT_RECRUITING
A Study of an Epstein-Barr Virus (EBV) Candidate Vaccine, mRNA-1189, in 10- to 30-Year-Old Healthy Adolescents and Adults
Epstein-Barr Virus InfectionUnlock trial analytics

Study Endpoints

Primary Endpoints

Number of Participants with Solicited Local and Systemic Adverse Reactions (ARs)
Up to Day 64 (7-day follow-up after vaccination)
Number of Participants with Unsolicited Adverse Events (AEs)
Up to Day 85 (28-day follow-up after vaccination)
Number of Participants with Medically Attended Adverse Events (MAAEs)
Day 1 up to Day 225
Number of Participants With Serious Adverse Events (SAEs), Any AEs Leading to Withdrawal From Study/Discontinuation of Study Vaccine and AEs of Special Interest (AESIs)
Day 1 to end of study (EOS) (Day 225)
Number of Participants with Solicited Local and Systemic Reactogenicity Adverse Reactions (ARs)
Up to Day 176 (7-day follow-up after vaccination)
Number of Participants with SAEs, MAAEs, Any AEs Leading to Withdrawal From Study/Discontinuation of Study Vaccine and AEs of Special Interest (AESIs)
Day 1 to end of study (EOS) (Day 505)
Number of Participants with Laboratory Abnormalities
Up to Day 176 (7-day follow-up after vaccination)

Secondary Endpoints

Geometric Mean Titer of Antigen-Specific Binding Antibody (bAb)
Days 1 and 85
Geometric Mean Fold Rise (GMFR) of Antigen-Specific bAb
Day 85
Number of Participants With Seroconversion of Antigen-Specific bAbs
Day 85
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Study Design & Arms

AllocationRANDOMIZED
MaskingNONE
ModelPARALLEL
PurposePREVENTION

Treatment Arms

ArmTypeDescription
mRNA-1189 Dose Level 1 (ID)EXPERIMENTALParticipants will receive 2 intradermal (ID) injections of mRNA-1189 at Dose Level 1 on Days 1 and 57.
mRNA-1189 Dose Level 2 (ID)EXPERIMENTALParticipants will receive 2 ID injections of mRNA-1189 at Dose Level 2 on Days 1 and 57.
mRNA-1189 Dose Level 1 (IM)EXPERIMENTALParticipants will receive 2 intramuscular (IM) injections of mRNA-1189 at Dose Level 1 on Days 1 and 57.
mRNA-1189 Dose Level 2 (IM)EXPERIMENTALParticipants will receive 2 IM injections of mRNA-1189 at Dose Level 2 on Days 1 and 57.
Part A: mRNA-1189 Dose Level 2EXPERIMENTALParticipants will receive 3 intramuscular (IM) injections of mRNA-1189 at Dose Level 2 on Days 1, 57, and 169.
Part A: mRNA-1189 Dose Level 3EXPERIMENTALParticipants will receive 3 IM injections of mRNA-1189 at Dose Level 3 on Days 1, 57, and 169.
Part A: mRNA-1189 Dose Level 4EXPERIMENTALParticipants will receive 3 IM injections of mRNA-1189 at Dose Level 4 on Days 1, 57, and 169.
Part A: PlaceboPLACEBO_COMPARATORParticipants will receive 3 IM injection of study drug-matching placebo on Days 1, 57, and 169.
Part B: mRNA-1189 Dose Level 1EXPERIMENTALParticipants will receive 3 IM injections of mRNA-1189 at Dose Level 1 on Days 1, 57, and 169.
Part B: mRNA-1189 Dose Level 2EXPERIMENTALParticipants will receive 3 IM injections of mRNA-1189 at Dose Level 2 on Days 1, 57, and 169.
Part B: mRNA-1189 Dose Level 3EXPERIMENTALParticipants will receive 3 IM injections of mRNA-1189 at Dose Level 3 on Days 1, 57, and 169.
Part B: mRNA-1189 Dose Level 4EXPERIMENTALParticipants will receive 3 IM injections of mRNA-1189 at Dose Level 4 on Days 1, 57, and 169.
Part B: PlaceboPLACEBO_COMPARATORParticipants will receive 3 IM injection of study drug-matching placebo on Days 1, 57, and 169.
Part C: mRNA-1189 Dose Level 1EXPERIMENTALParticipants will receive 3 IM injections of mRNA-1189 at Dose Level 1 on Days 1, 57, and 169.
Part C: mRNA-1189 Dose Level 2EXPERIMENTALParticipants will receive 3 IM injections of mRNA-1189 at Dose Level 2 on Days 1, 57, and 169.
Part C: mRNA-1189 Dose Level 3EXPERIMENTALParticipants will receive 3 IM injections of mRNA-1189 at Dose Level 3 on Days 1, 57, and 169.
Part C: PlaceboPLACEBO_COMPARATORParticipants will receive 3 IM injection of study drug-matching placebo on Days 1, 57, and 169.

Interventions

NameTypeDescription
mRNA-1189BIOLOGICALSterile liquid for injection
PlaceboBIOLOGICAL0.9% sodium chloride (normal saline) injection
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Eligibility Criteria

Age Range18 Years to 30 Years
SexALL
Healthy VolunteersYes
Study Sites2

Inclusion Criteria: * Healthy as determined by medical evaluation including medical history and physical examination. * Participants who are assigned female at birth or could become pregnant are eligible to participate if the participant is not pregnant or breast/chest feeding. Exclusion Criteria:...

Countries:AustraliaUnited States
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Frequently asked questions about mRNA-1189

What is mRNA-1189?

mRNA-1189 is an investigational vaccine developed by Moderna, Inc. for the prevention of Epstein-Barr Virus (EBV) infection. It is an mRNA-based candidate designed to protect against EBV, a virus that causes infectious mononucleosis and is associated with certain cancers and autoimmune conditions. It remains in clinical development and is not approved for use.

What is mRNA-1189 used for in Epstein-Barr Virus?

mRNA-1189 is being studied to prevent Epstein-Barr Virus infection in healthy adolescents and adults. Clinical trials have enrolled healthy volunteers aged 10 to 30 years, including a Phase 1 study of 867 participants in the United States and a separate Phase 1 study of 120 healthy adults aged 18 to 30 in Australia.

Who is developing mRNA-1189?

mRNA-1189 is being developed by Moderna, Inc., which trades on the Nasdaq under the ticker MRNA. Moderna is the sponsor of the clinical program evaluating the vaccine candidate in healthy adolescent and adult volunteers.

What phase is mRNA-1189 in?

mRNA-1189 is in Phase 1 clinical development. It is an investigational vaccine candidate and has not been approved by the FDA or any other regulatory agency. Two Phase 1 trials have been conducted, one of which is currently recruiting and the other active but not recruiting.

What clinical trials is mRNA-1189 in?

mRNA-1189 has been evaluated in two Phase 1 trials. NCT05164094 studied the vaccine in 10- to 30-year-old healthy adolescents and adults across the United States and is active but not recruiting. NCT07478952 is a recruiting Phase 1 study in healthy adults aged 18 to 30 in Australia.

How many people have been enrolled in mRNA-1189 trials?

Clinical trials of mRNA-1189 have enrolled a total of 867 participants. The Phase 1 study NCT05164094 accounts for all 867 of those participants, while the currently recruiting Phase 1 study NCT07478952 plans to enroll 120 healthy adults aged 18 to 30 in Australia.