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Study identifier: NCT05330975 Synced from ClinicalTrials.gov · August 07, 2026
● Study status: Completed

A Study of mRNA-1345 Vaccine Targeting Respiratory Syncytial Virus (RSV) in Adults ≥50 Years of Age

Condition: Respiratory Syncytial Virus  ·  Sponsor: ModernaTX, Inc.

PhasePhase 3
Planned participants3317
Who can joinAll sexes, 50 Years to no upper limit
Healthy volunteersYes

Sponsor, CRO or site team? See where this study is running → — listed sites, countries and recruiting context. Everything below is written for patients and caregivers.

About this study

The main purposes of Part A of this study are to evaluate the safety, tolerability, and immunogenicity of mRNA-1345 coadministered with a seasonal influenza vaccine (Afluria® Quadrivalent); to evaluate the impact of coadministered influenza vaccine on the immune response to RSV-A; and to evaluate the impact of coadministered RSV vaccine on the immune response to influenza. The main purposes of Part B of this study are to evaluate the safety, tolerability, and immunogenicity of mRNA-1345 coadministered with mRNA-1273.214; to evaluate the effect of coadministered mRNA-1273.214 on the immune response to RSV-A; and to evaluate the effect of coadministered RSV vaccine on the immune response to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The main purposes of Part C (single arm, open-label) of this study are to evaluate the safety and tolerability of a booster dose (BD) of mRNA-1345 administered at 1 Year following a primary dose; to evaluate the immune response to RSV-A of a BD of mRNA 1345 administered at 1 Year following a primary dose; and to evaluate the immune response to RSV-B of a BD of mRNA-1345 administered at 1 Year following a primary dose.

This description comes directly from the study's public registry record.

Talk to the study team

No contact information is available for this study as per the public registry record.

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Locations (62)

Central Research Associates IncBirmingham, Alabama, United States
Del Sol Research Management - Clinedge - PPDSTucson, Arizona, United States
Paragon Rx Clinical, IncGarden Grove, California, United States
Ark Clinical ResearchLong Beach, California, United States
Long Beach Clinical Trials, LLC (Site 1)Long Beach, California, United States
Long Beach Clinical Trials, LLC (Site 2)Long Beach, California, United States
Central Valley Research, LLCModesto, California, United States
Velocity Clinical Research - Panorama CityPanorama City, California, United States
Empire Clinical ResearchPomona, California, United States
Acclaim Clinical ResearchSan Diego, California, United States
Medical Center For Clinical Research - M3 WR - ERN - PPDSSan Diego, California, United States
Ark Clinical ResearchTustin, California, United States

+ 50 more locations — full list on the registry record.

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