Influenza Vaccine Study for Adults

We are assessing a new mRNA-based vaccine to see how well it boosts the immune response and its safety in adults aged 18 and older. This study aims to improve protection against seasonal influenza.

6-12 months ≤5 visits Efficacy phase (II)Post-Trial Drug Access No Placebo Cost Reimbursement Investigational Medicines InjectionInfectious Diseases

What diseases are being studied?

Health conditions and diseases that the clinical trial is designed to study and treat.

Who can participate in the clinical trial?

These questions help us understand your situation so we can let the trial team know whether you might be a potential match. This is not a medical evaluation and is not part of the official screening, the study doctor will make the final decision..

What medicines are being studied?

Medicines that are officially approved for use in the European Union and considered safe by EMA. These medicines are already on the market and may be tested for new conditions or populations.

Alpharix

What active substances are being studied?

Active substances that are officially approved for use in the European Union and considered safe by EMA. These substances are already on the market and may be tested for new conditions or populations.

Inactivated

Influenza A Virus Subtype H1n1 Haemagglutinin

Influenza A H1N1 haemagglutinin is a viral surface protein used in vaccines to stimulate immunity against H1N1 influenza.

Influenza A Virus Subtype H3n2 Haemagglutinin

Influenza A H3N2 haemagglutinin is a viral protein used in vaccines to stimulate immunity against H3N2 flu strains.

What experimental substances are being tested?

Experimental substances that are being investigated in this clinical trial. These are not yet approved for general use.

Influenza

Recombinant

What similar medicines might you know?

Don't worry if you don't know the medicines tested in the trial. There is a chance you have heard about the similar medicines. Check the list below to see if you are familiar with any of them.

Afluria Tetra

Alpharix-Tetra

Batrevac Tetra

Where is the clinical trial being conducted?

Locations and medical facilities where this clinical trial is currently recruiting or conducting research. Select the locations where you would like to participate.

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Universitair Ziekenhuis Gent

Center for Vaccinology

Ledeberg, Belgium

University Of Antwerp

Center for Evaluation of Vaccination

Wilrijk, Belgium

Sponsor: GlaxoSmithKline Biologicals

Last updated: Nov 27, 2025

Disclaimer: Parts of this content have been automatically extracted from the EU Clinical Trials registry. While we strive for accuracy, please always contact the trial site or sponsor directly for correct and official information before making any decisions about participation. View on EU Clinical Trials.