CI

At a glance

ClinicalIndex Comparison Record
Phase 3Completed· 861 enrolled
Drug / intervention
Ad26.COV2.S +2 morebiological
Likely dose
Not stated in 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/NCT05091307
NCT05091307Phase 3Completed

A Randomized, Double-blind, Phase 3 Study to Evaluate Safety, Reactogenicity, and Immunogenicity of Co-administration of Ad26.COV2.S and Influenza Vaccines in Healthy Adults 18 Years of Age and Older

Janssen Vaccines & Prevention B.V.·interventional·Posted Oct 25, 2021·Updated May 25, 2025

In Brief

A Phase 3 clinical trial evaluating Ad26.COV2.S, Placebo, and 1 other intervention for COVID-19 Prevention. Completed, enrolled 861 participants across 31 sites in 3 countries.

Detailed Summary

The purpose of this study is to demonstrate the non-inferiority (NI) of the humoral immune response of the 4 influenza vaccine strains after concomitant administration of the Ad26.COV2.S vaccine and a seasonal quadrivalent standard-dose influenza vaccine versus the administration of a seasonal quadrivalent standard-dose influenza vaccine administered alone; and to demonstrate the NI of the binding antibody response after concomitant administration of Ad26.COV2.S vaccine and a seasonal quadrivalent standard-dose influenza vaccine versus the administration of Ad26.COV2.S vaccine administered alone.

Study Details

Study Typeinterventional
Allocation--
Masking--
Primary Purpose--
CountriesBelgium, Poland, United States
Collaborators--

Timeline

Phase 3CompletedFinished
20222023202420252026
First PostedOct 25, 2021
Enrollment StartNov 2, 2021
Primary CompletionJun 17, 2022
Study CompletionNov 15, 2022
TodayJul 2, 2026
Enrollment to primary: 8 monthsPosted 4.7 years ago

Interventions

Ad26.COV2.Sbiological

Ad26.COV2.S will be administered as an IM injection.

Placeboother

Placebo will be administered as an IM injection.

Influenza Vaccinebiological

Influenza vaccine high and standard dose will be administered as IM injection.