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ClinicalTrials.gov record
Completed Phase 3 Interventional Accepts healthy volunteers Results available

A Study to Evaluate a Modified RNA Vaccine Against Influenza in Adults 18 Years of Age or Older

ClinicalTrials.gov ID: NCT05540522

Public ClinicalTrials.gov record NCT05540522. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.

ClinicalTrials.gov public records Last synced Apr 27, 2026, 7:25 AM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Official title

A PHASE 3, RANDOMIZED, OBSERVER-BLINDED STUDY TO EVALUATE THE EFFICACY, SAFETY, TOLERABILITY, AND IMMUNOGENICITY OF A MODIFIED RNA VACCINE AGAINST INFLUENZA COMPARED TO LICENSED INACTIVATED INFLUENZA VACCINE IN HEALTHY ADULTS 18 YEARS OF AGE OR OLDER

Study identification

NCT ID
NCT05540522
Recruitment status
Completed
Study type
Interventional
Phase
Phase 3
Lead sponsor
Pfizer
Industry
Enrollment
45,789 participants

Conditions and interventions

Interventions

  • Quadrivalent influenza modRNA vaccine Biological
  • Quadrivalent influenza vaccine Biological

Biological

Eligibility (public fields only)

Age range
18 Years and older
Sex
All
Healthy volunteers
Accepts healthy volunteers

This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.

Study timeline

Start date
Sep 11, 2022
Primary completion
Mar 11, 2024
Completion
Mar 11, 2024
Last update posted
May 7, 2025

2022 – 2024

United States locations

U.S. sites
263
U.S. states
42
U.S. cities
195
Facility City State ZIP Site status
North Alabama Research Center Athens Alabama 35611
St. Vincent's Birmingham Hospital Birmingham Alabama 35205
Accel Research Sites Network - Birmingham Clinical Research Unit Birmingham Alabama 35216
Ross Bridge Medical Practice, LLC-CCT Research Birmingham Alabama 35226
SEC Clinical Research Dothan Alabama 36305
Lakeview Clinical Research Guntersville Alabama 35976
Medical Affiliated Research Center Huntsville Alabama 35801
Lenzmeier Family Medicine/CCT Research Glendale Arizona 85308
Aventiv Research Mesa Arizona 85206
Desert Clinical Research/ CCT Research Mesa Arizona 85213
HOPE Research Institute Phoenix Arizona 85018
The Pain Center of Arizona Phoenix Arizona 85018
HOPE Research Institute - Phoenix Phoenix Arizona 85023
HOPE Research Institute Phoenix Arizona 85023
Foothills Research Center/ CCT Research Phoenix Arizona 85044
Epic Medical Research - Surprise Surprise Arizona 85378
Fiel Family and Sports Medicine, PC/CCT Research Tempe Arizona 85283
HOPE Research Institute Tempe Arizona 85284
Noble Clinical Research Tucson Arizona 85704
Baptist Health Center For Clinical Research Little Rock Arkansas 72205
Applied Research Center of Arkansas Little Rock Arkansas 72212
Anaheim Clinical Trials Anaheim California 92801
Velocity Clinical Research, San Bernardino Banning California 92220
Benchmark Research Colton California 92324
Ascada Health PC dba Ascada Research Fullerton California 92835
Marvel Clinical Research Huntington Beach California 92647
Velocity Clinical Research, Huntington Park Huntington Park California 90255
Velocity Clinical Research, San Diego La Mesa California 91942
Orange County Research Center Lake Forest California 92630
Ark Clinical Research Long Beach California 90815
Kaiser Permanente Los Angeles California 90027
Velocity Clinical Research, Westlake Los Angeles California 90057
Velocity Clinical Research, North Hollywood North Hollywood California 91606
Center for Clinical Trials, LLC Paramount California 90723
Empire Clinical Research Pomona California 91767
Paradigm Clinical Research Centers, Inc Redding California 96001
Peninsula Research Associates Rolling Hills Estates California 90274
Benchmark Research Sacramento California 95864
Artemis Institute for Clinical Research San Diego California 92103
Wr-McCr, Llc San Diego California 92120
California Research Foundation San Diego California 92123
Encompass Clinical Research Spring Valley California 91978
Med Partners, Inc. dba Premiere Medical Center of Burbank, Inc. Toluca Lake California 91602
Collaborative Neuroscience Research, LLC Torrance California 90504
Ark Clinical Research - Tustin Tustin California 92780
Diablo Clinical Research, Inc. Walnut Creek California 94598
Lynn Institute of Denver Aurora Colorado 80012
Tekton Research, LLC. Fort Collins Colorado 80525
Tekton Research, LLC. Longmont Colorado 80501
Paradigm Clinical Research Centers, Inc Wheat Ridge Colorado 80033
New England Research Associates, LLC Bridgeport Connecticut 06606
Clinical Research Consulting Milford Connecticut 06460
New Haven Clinical Research Unit New Haven Connecticut 06511
Yale Cardiology New Haven Connecticut 06519
Yale University School of Medicine New Haven Connecticut 06519
Stamford Therapeutics Consortium Stamford Connecticut 06905
Washington Health Institute Washington D.C. District of Columbia 20017
JEM Research Institute Atlantis Florida 33462
Tampa Bay Medical Research Clearwater Florida 33761
Alliance for Multispecialty Research, LLC Coral Gables Florida 33134
Universal Axon Clinical Research, LLC Doral Florida 33166
Fleming Island Center for Clinical Research Fleming Island Florida 32003
Proactive Clinical Research,LLC Fort Lauderdale Florida 33308
Alliance for Multispecialty Research, LLC Fort Myers Florida 33912
Robert B. Pritt, DO Fort Myers Florida 33912
Best Quality Research,Inc. Hialeah Florida 33016
Jacksonville Center for Clinical Research Jacksonville Florida 32216
Clinical Neuroscience Solutions, Inc. dba CNS Healthcare Jacksonville Florida 32256
Health Awareness Jupiter Florida 33458
Wr-Msra.Llc Lake City Florida 32055
JEM Research Institute Lake Worth Florida 33462
Accel Research Sites Network - Lakeland Clinical Research Unit Lakeland Florida 33803
Accel Research Sites - St. Petersburg Clinical Research Unit Largo Florida 33777
Accel Research Sites Network - Maitland Clinical Research Unit Maitland Florida 32751
Care Research - West Flagler Street Miami Florida 33130
Gerardo Polanco, MD Miami Florida 33156
Entrust Clinical Research Miami Florida 33176
Miami Dade Medical Research Institute, LLC Miami Florida 33176
Palm Springs Community Health Center Miami Lakes Florida 33014
Clinical Neuroscience Solutions, Inc. Orlando Florida 32801
Headlands Research Orlando Orlando Florida 32819
Innovation Medical Research Center Palmetto Bay Florida 33157
DBC Research USA Pembroke Pines Florida 33029
United Medical Research Port Orange Florida 32127
Genesis Clinical Research, LLC Tampa Florida 33603
Angels Clinical Research Institute Tampa Florida 33614
Clinical Site Partners, LLC dba Flourish Research Winter Park Florida 32789
Centricity Research Columbus Georgia Multispecialty Columbus Georgia 31904
IACT Health Rincon Georgia 31326
Centricity Research Rincon Pulmonology Rincon Georgia 31406
AGILE Clinical Research Trials, LLC Sandy Springs Georgia 30328
WR-Mount Vernon Clinical Research, LLC Sandy Springs Georgia 30328
CenExel iResearch, LLC Savannah Georgia 31405
Javara - Privia Medical Group Georgia - Savannah Savannah Georgia 31406
Velocity Clinical Research, Savannah Savannah Georgia 31406
Clinical Research Atlanta Stockbridge Georgia 30281
Rophe Adult and Pediatric Medicine/SKYCRNG Union City Georgia 30291
East-West Medical Research Institute Honolulu Hawaii 96814
Clinical Research Prime Idaho Falls Idaho 83404
Solaris Clinical Research Meridian Idaho 83646
Koch Family Medicine Morton Illinois 61550
Accellacare - DuPage Oak Lawn Illinois 60453
MediSphere Medical Research Center - Evansville - West Franklin Street Evansville Indiana 47712
MediSphere Medical Research Center - EAST Evansville Indiana 47714
Velocity Clinical Research, Valparaiso Valparaiso Indiana 46383
University of Iowa Iowa City Iowa 52242
Velocity Clinical Research, Sioux City Sioux City Iowa 51106
Alliance for Multispecialty Research, LLC Newton Kansas 67114
Alliance for Multispecialty Research, LLC Wichita Kansas 67205
Alliance for Multispecialty Research, LLC Wichita Kansas 67207
Alliance for Multispecialty Research, LLC Lexington Kentucky 40509
Versailles Family Medicine / CCT Research Versailles Kentucky 40383
MedPharmics, LLC Lafayette Louisiana 70508
DelRicht Research New Orleans Louisiana 70115
Alliance for Multispecialty Research, LLC New Orleans Louisiana 70119
Louisiana State University Health Sciences Shreveport Shreveport Louisiana 71101
Pharmaron Baltimore Maryland 21201
Advanced Primary and Geriatric Care - CCT Research Rockville Maryland 20850
Jadestone Clinical Research Silver Spring Maryland 20904
Brigham and Women's Hospital Boston Massachusetts 02115
Boston Medical Center Boston Massachusetts 02118
ActivMed Practices and Research Methuen Massachusetts 01844
University of Massachusetts Chan Medical School Worcester Massachusetts 01655
Henry Ford Hospital Detroit Michigan 48202
Ascension St. John Hospital Grosse Pointe Woods Michigan 48236
Revival Research Institute, LLC Sterling Heights Michigan 48312
Oakland Medical Research Troy Michigan 48085
Arcturus Healthcare , PLC, Troy Internal Medicine Research Division Troy Michigan 48098
Clinical Research Professionals Chesterfield Missouri 63005
Bio-Kinetic Clinical Applications, LLD dba QPS-MO Springfield Missouri 65802
QPS Bio-Kinetic Clinical Applications (Patient Screening Only) Springfield Missouri 65807
Saint Louis University Center for Vaccine Development St Louis Missouri 63104
Sundance Clinical Research St Louis Missouri 63141
Bozeman Health Deaconess Hospital Bozeman Montana 59715
Methodist Physicians Clinic/CCT Research Fremont Nebraska 68025
Velocity Clinical Research, Grand Island Grand Island Nebraska 68803
Be Well Clinical Studies Lincoln Nebraska 68516
Velocity Clinical Research, Norfolk Norfolk Nebraska 68701
Quality Clinical Research Omaha Nebraska 68114
Velocity Clinical Research, Omaha Omaha Nebraska 68134
Papillion Research Center/CCT Research Papillion Nebraska 68046
Excel Clinical Research, LLC Las Vegas Nevada 89109
Santa Rosa Medical Centers of Nevada / CCT Research Las Vegas Nevada 89119
ActivMed Practices & Research, LLC. Portsmouth New Hampshire 03801
David Jurist Research Building Hackensack New Jersey 07601
Hackensack University Medical Center Medical Plaza Hackensack New Jersey 07601
Hackensack University Medical Center Hackensack New Jersey 07601
South Jersey Infectious Disease Somers Point New Jersey 08244
Albuquerque Clinical Trials, Inc. Albuquerque New Mexico 87102
Velocity Clinical Research, Albuquerque Albuquerque New Mexico 87107
Smith Allergy & Asthma Specialists Horseheads New York 14845
NYU Langone Health New York New York 10016
Rochester Clinical Research, LLC Rochester New York 14609
Velocity Clinical Research, Vestal Vestal New York 13850
Accellacare - Cary Cary North Carolina 27518
Accellacare - Charlotte Charlotte North Carolina 28211
Carolina Institute for Clinical Research Fayetteville North Carolina 28303
PharmQuest Life Sciences, LLC Greensboro North Carolina 27408
Accellacare - Hickory Hickory North Carolina 28601
Monroe Biomedical Research Monroe North Carolina 28112
Accellacare - Raleigh Raleigh North Carolina 27609
M3 Wake Research, Inc. Raleigh North Carolina 27612
Accellacare - Rocky Mount Rocky Mount North Carolina 27804
Accellacare - Salisbury Salisbury North Carolina 28144
Accellacare - Wilmington Wilmington North Carolina 28401
Trial Management Associates - Wilmington - Floral Parkway Wilmington North Carolina 28403
Accellacare - Winston-Salem Winston-Salem North Carolina 27103
Plains Clinical Research Center Fargo North Dakota 58104
Plains Medical Clinic, LLC Fargo North Dakota 58104
CTI Clinical Research Center Cincinnati Ohio 45212
Meridian Clinical Research, LLC Cincinnati Ohio 45219
Cincinnati Children's Hospital Medical Center Cincinnati Ohio 45229
University Hospitals Cleveland Medical Center Cleveland Ohio 44106
Senders Pediatrics Cleveland Ohio 44121
Velocity Clinical Research, Cleveland Cleveland Ohio 44122
Centricity Research Columbus Ohio Multispecialty Columbus Ohio 43213
Dayton Clinical Research Dayton Ohio 45409
WellNow Urgent Care & Research Dayton Ohio 45424
PriMED Clinical Research Dayton Ohio 45429
Tekton Research, LLC. Edmond Oklahoma 73013
Tekton Research, LLC. Moore Oklahoma 73160
Lynn Institute of Norman Norman Oklahoma 73072
Lynn Health Science Institute Oklahoma City Oklahoma 73112
Tekton Research, LLC. Yukon Oklahoma 73099
Velocity Clinical Research, Medford Medford Oregon 97504
Kaiser Permanente Northwest Center for Health Research Portland Oregon 97227
Lehigh Valley Health Network Allentown Pennsylvania 18102
Capital Area Research, LLC Camp Hill Pennsylvania 17011
Central Erie Primary Care Erie Pennsylvania 16508
Velocity Clinical Research, Providence East Greenwich Rhode Island 02818
Velocity Clinical Research, Anderson Anderson South Carolina 29621
Pharmacorp Clinical Trials Charleston South Carolina 29412
Velocity Clinical Research, Columbia Columbia South Carolina 29204
Velocity Clinical Research, Gaffney Gaffney South Carolina 29340
Tribe Clinical Research, LLC Greenville South Carolina 29607
Main Street Physician's Care Little River South Carolina 29566
Clinical Trials of South Carolina Moncks Corner South Carolina 29461
Trial Management Associates Myrtle Beach South Carolina 29572
Coastal Carolina Research Center North Charleston South Carolina 29405
Velocity Clinical Research, Spartanburg Spartanburg South Carolina 29303
Velocity Clinical Research, Union Union South Carolina 29379
Internal Medicine and Pediatric Associates of Bristol Bristol Tennessee 37620
WR-Clinsearch, LLC Chattanooga Tennessee 37421
Holston Medical Group Kingsport Tennessee 37660
Alliance for Multispecialty Research, LLC Knoxville Tennessee 37909
New Phase Research and Development Knoxville Tennessee 37909
Accellacare US Inc., d/b/a Accellacare of Knoxville Knoxville Tennessee 37912
Accellacare US Inc., d/b/a Accellacare of Knoxville Knoxville Tennessee 37938
Clinical Neuroscience Solutions Inc. Memphis Tennessee 38119
Elligo Clinical Research Center Austin Texas 78704
Benchmark Research Austin Texas 78705
Tekton Research, LLC. Austin Texas 78745
Orion Clinical Research Austin Texas 78759
Velocity Clinical Research, Austin Austin Texas 78759
Headlands Research - Brownsville Brownsville Texas 78526
WR-Global Medical Research, LLC Dallas Texas 75224
DFW Clinical Research Dallas Texas 75234
North Texas Infectious Diseases Consultants, P.A Dallas Texas 75246
Epic Medical Research - DeSoto DeSoto Texas 75115
Proactive Clinical Research, LLC Edinburg Texas 78539
Benchmark Research Fort Worth Texas 76135
Texas Health Family Care Fort Worth Texas 76135
Allure Health Friendswood Texas 77546
Trio Clinical Trials Houston Texas 77008
Juno Research Houston Texas 77040
Prolato Clinical Research Center Houston Texas 77054
DM Clinical Research - Bellaire Houston Texas 77081
Santa Clara Family Clinic Houston Texas 77087
Dynamed Clinical Research, LP d/b/a DM Clinical Research Humble Texas 77338
Andres Garcia Zuniga, M.D., P.A. Laredo Texas 78041
SMS Clinical Research Mesquite Texas 75149
AIM Trials, LLC Plano Texas 75093
Clinical Trials of Texas, LLC San Antonio Texas 78229
IMA Clinical Research San Antonio San Antonio Texas 78229
Tekton Research, LLC. San Antonio Texas 78229
Javara - Privia Medical Group North Texas - Stephenville Stephenville Texas 76401
Sugar Lakes Family Practice, PA Sugar Land Texas 77479
DM Clinical Research, Martin Diagnostic Clinic Tomball Texas 77375
Northwest Houston Heart Center Tomball Texas 77375
Crossroads Clinical Research Victoria Texas 77901
Cope Family Medicine / CCT Research Bountiful Utah 84010
South Ogden Family Medicine/ CCT Research Ogden Utah 84405
J. Lewis Research, Inc. / Foothill Family Clinic Salt Lake City Utah 84109
Olympus Family Medicine/CCT Research Salt Lake City Utah 84117
J. Lewis Research, Inc. / Foothill Family Clinic South Salt Lake City Utah 84121
J. Lewis Research, Inc. / Jordan River Family Medicine South Jordan Utah 84095
Springville Dermatology - Springville/CCT Research Springville Utah 84663
Velocity Clinical Research, Salt Lake City West Jordan Utah 84088
Clinical Alliance for Research and Education - Infectious Diseases (CARE-ID), LLC Annandale Virginia 22003
Charlottesville Medical Research Charlottesville Virginia 22911
Virginia Research Center Midlothian Virginia 23114
Health Research of Hampton Roads, Inc. Newport News Virginia 23606
Alliance for Multispecialty Research, LLC Norfolk Virginia 23502
Meridian Clinical Research LLC Portsmouth Virginia 23703
Clinical Research Partners, LLC Richmond Virginia 23226
Centricity Research Suffolk Primary Care Suffolk Virginia 23435
EvergreenHealth Medical Center Kirkland Washington 98034
EvergreenHealth Kirkland Washington 98034
Rainier Clinical Research Center Renton Washington 98057
Kaiser Permanente Washington Health Research Institute (KPWHRI) Seattle Washington 98101
Kaiser Permanente Washington Health Research Institute Seattle Washington 98101
Seattle Clinical Research Center Seattle Washington 98105
Allegiance Research Specialists, LLC Wauwatosa Wisconsin 53226

Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.

Non-U.S. locations

This page focuses on the U.S. directory. The official record also lists 58 non-U.S. sites.

About this trial record page

What this page shows
Public field values for ClinicalTrials.gov record NCT05540522, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
What this page does not do
No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
Where the data comes from
Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
Last refresh
Last update posted May 7, 2025 · Synced Apr 27, 2026

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Open the official record

The complete protocol, eligibility criteria, and contact information for NCT05540522 live on ClinicalTrials.gov.

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