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Study identifier: NCT07431853 Synced from ClinicalTrials.gov · July 29, 2026
● Recruiting

A Study to Learn About mRNA Vaccines Against Influenza in Adults

Condition: Healthy Adults  ·  Sponsor: Pfizer

PhasePhase 2
Planned participants770
Who can joinAll sexes, 18 Years to no upper limit
Healthy volunteersYes

About this study

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. Participants will take part in this study for about 6 months, and participants will need to visit the study site at least 3 times. A blood sample will be taken at each of the 3 planned study visits and a swab from inside the nose will be taken at the first study visit.

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

Talk to the study team

Pfizer CT.gov Call Center  ·  1-800-718-1021  ·  ClinicalTrials.gov_Inquiries@pfizer.com

Always discuss trial participation with your own doctor first.

Locations (15)

AMR ClinicalMobile, Alabama, United StatesRecruiting
Diablo Clinical Research, LLC d/b/a Flourish ResearchWalnut Creek, California, United StatesRecruiting
Clinical Research Consulting, LLCMilford, Connecticut, United StatesRecruiting
George Washington Medical Faculty AssociatesWashington D.C., District of Columbia, United StatesRecruiting
Indago Research & Health Center, IncHialeah, Florida, United StatesRecruiting
Palm Springs Community Health CenterMiami Lakes, Florida, United StatesRecruiting
Clinical Research AtlantaStockbridge, Georgia, United StatesRecruiting
East-West Medical Research InstituteHonolulu, Hawaii, United StatesRecruiting
AMR ClinicalKansas City, Missouri, United StatesRecruiting
Rochester Clinical Research, LLCRochester, New York, United StatesRecruiting
DM Clinical Research - PhiladelphiaPhiladelphia, Pennsylvania, United StatesRecruiting
SMS Clinical Research LLCMesquite, Texas, United StatesRecruiting

+ 3 more locations — full list on the registry record.

Follow this study

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Source record: clinicaltrials.gov/study/NCT07431853