CI

At a glance

ClinicalIndex Comparison Record
Phase 1Completed· 114 enrolled
Drug / intervention
mRNA-CR-04 vaccine 10μg +4 morebiological
Likely dose
mRNA-CR-04 vaccine 10μgfrom record
Structured eligibility isn't available for this trial yet — see the full criteria in the Eligibility tab below.

Standardized by ClinicalIndex from the ClinicalTrials.gov record · verify against the source.

Search/NCT05972993
NCT05972993Phase 1Completed

Exploratory, First Time in Human (FTIH), Observer-blind, Randomized, Controlled Study to Evaluate Safety, Reactogenicity and Immunogenicity of Various Doses of GlaxoSmithKline Biologicals SA's (GSK) Investigational Omicron Variant S Glycoprotein (mRNA-CR-04) Vaccine When Administered Intramuscularly in Healthy Adults 18 to 49 Years of Age

GlaxoSmithKline·interventional·Posted Aug 2, 2023·Updated May 28, 2025

In Brief

A Phase 1 clinical trial evaluating mRNA-CR-04 vaccine 10μg, mRNA-CR-04 vaccine 30μg, and 3 other interventions for COVID-19. Completed, enrolled 114 participants across 4 sites.

Detailed Summary

The purpose of this study is to evaluate the safety, reactogenicity and immune responses of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) mRNA-CR-04 vaccine construct when administered in healthy adults previously vaccinated with SARS-CoV-2 mRNA vaccines.

Study Details

Study Typeinterventional
Allocation--
Masking--
Primary Purpose--
ConditionsCOVID-19
CountriesUnited States
Collaborators--

Timeline

Phase 1CompletedFinished
202420252026
First PostedAug 2, 2023
Enrollment StartAug 7, 2023
Primary CompletionMay 9, 2024
Study CompletionOct 14, 2024
TodayJul 2, 2026
Enrollment to primary: 9 monthsPosted 2.9 years ago

Interventions

mRNA-CR-04 vaccine 10μgbiological

mRNA CR-04 vaccine, 10 µg, is administered intramuscularly into the deltoid muscle of the non-dominant arm on day 1.

mRNA-CR-04 vaccine 30μgbiological

mRNA CR-04 vaccine, 30 µg, is administered intramuscularly into the deltoid muscle of the non-dominant arm on day 1.

mRNA-CR-04 vaccine 100μgbiological

mRNA CR-04 vaccine, 100 µg, is administered intramuscularly into the deltoid muscle of the non-dominant arm on day 1.

Placebodrug

Placebo is administered intramuscularly into the deltoid muscle of the non-dominant arm on day 1.

mRNA-CR-04 vaccine 3μgbiological

mRNA CR-04 vaccine, 3 µg, is administered intramuscularly into the deltoid muscle of the non-dominant arm on day 1.