A Study to Learn About mRNA Vaccines Against Influenza in Adults

Summary

The purpose of this study is to learn about safety in participants taking the study vaccine (mRNA-based vaccine) and the ability of the study vaccine to trigger the body's immune response, targeting the flu virus (influenza virus). This study is seeking healthy participants 18 years of age or older. All participants in this study will receive only 1 dose in their arm, to deliver one of the experimental flu vaccines or one of the approved flu vaccines used for comparison.

Shortened from the sponsor's brief summary. View official record on ClinicalTrials.gov

Conditions studied

• Healthy Adults

Eligibility basics and study details

Study type

Interventional

Phase

Phase 2

Ages

18 years and older

Sex

All

Healthy volunteers

Accepted

Sponsor

Pfizer

Last updated on ClinicalTrials.gov

May 6, 2026

These are the basic criteria only. The full inclusion and exclusion criteria are on the official record, and the study team decides who can take part.

US recruiting sites