One shot for two threats: combined COVID-Flu vaccine moves to final testing
NCT ID NCT06178991
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study tested a single combined vaccine that aims to protect against both COVID-19 and influenza. About 8,800 healthy adults received either the combo shot or separate vaccines. Researchers checked for side effects and measured immune responses over six months to see if the combined approach is safe and works as well as separate shots.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Phase 3
Large-scale testing in a bigger group. Usually the last step before a treatment can be approved.
- Participants
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8,795 people
The number who actually took part.
- Started
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Dec 2023
- Finished
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Nov 2024
- Lead sponsor
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A company
The lead sponsor is a pharmaceutical, biotech, or medical-device company.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 to 64 years
- Sex
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Anyone
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Participants 18 through 64 years of age (or the minimum age of consent in accordance with local regulations) at Visit 1. * Healthy participants who are determined by medical history, physical examination (if required), and clinical judgment of the investigator to be eligible for inclusion in the study. Exclusion Criteria: * Vaccination with any investigational or licensed influenza vaccine within 6 months (175 days) before study intervention administration, or ongoing receipt of chronic antiviral therapy with activity against influenza. * Vaccination with any investigational or licensed COVID-19 vaccine within 6 months (175 days) before study intervention administration. Please refer to the study contact for further eligibility details
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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ACRC TRIALS / North Texas Family Medicine
Plano, Texas, 75093, United States
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ACRC Trials (Administrative Location)
Plano, Texas, 75024, United States
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AGILE Clinical Research Trials, LLC
Sandy Springs, Georgia, 30328, United States
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AIM Trials, LLC
Plano, Texas, 75093, United States
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AMR Clinical
Mobile, Alabama, 36608, United States
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AMR Clinical
Wichita, Kansas, 67207, United States
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AMR Clinical
Layton, Utah, 84041, United States
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AMR Clinical
Norfolk, Virginia, 23502, United States
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Accel Research Sites - Birmingham Clinical Research Unit
Birmingham, Alabama, 35216, United States
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Accellacare - Hickory
Hickory, North Carolina, 28601, United States
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Accellacare - Rocky Mount
Rocky Mount, North Carolina, 27804, United States
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Accellacare - Wilmington
Wilmington, North Carolina, 28401, United States
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Accellacare - Winston-Salem
Winston-Salem, North Carolina, 27103, United States
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Acclaim Clinical Research
San Diego, California, 92120, United States
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Alliance for Multispecialty Research, LLC
Tempe, Arizona, 85281, United States
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Alliance for Multispecialty Research, LLC
Kansas City, Missouri, 64114, United States
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Alliance for Multispecialty Research, LLC
Knoxville, Tennessee, 37909, United States
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Alliance for Multispecialty Research, LLC
Knoxville, Tennessee, 37920, United States
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Angels Clinical Research Institute
Miami Lakes, Florida, 33016, United States
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Angels Clinical Research Institute
Tampa, Florida, 33614, United States
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Ark Clinical Research
Long Beach, California, 90815, United States
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Artemis Institute for Clinical Research
San Diego, California, 92103, United States
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Ascada Health PC dba Ascada Research
Fullerton, California, 92835, United States
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Baptist Health Center For Clinical Research
Little Rock, Arkansas, 72205, United States
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Bayview Research Group, LLC
Valley Village, California, 91607, United States
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Benchmark Research
Austin, Texas, 78705, United States
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Benchmark Research
Fort Worth, Texas, 76135, United States
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Best Quality Research,Inc.
Hialeah, Florida, 33016, United States
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CTI Clinical Research Center
Cincinnati, Ohio, 45212, United States
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Centricity Research Columbus Georgia Multispecialty
Columbus, Georgia, 31904, United States
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Clinical Neuroscience Solutions Inc.
Memphis, Tennessee, 38119, United States
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Clinical Neuroscience Solutions, Inc.
Orlando, Florida, 32801, United States
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Clinical Neuroscience Solutions, Inc. dba CNS Healthcare
Jacksonville, Florida, 32256, United States
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Clinical Research Atlanta
Stockbridge, Georgia, 30281, United States
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Clinical Research Prime
Idaho Falls, Idaho, 83404, United States
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Clinical Research Professionals
Chesterfield, Missouri, 63005, United States
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Clinical Site Partners LLC, dba Flourish Research
Miami, Florida, 33186, United States
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Clinical Trials of Texas, LLC dba Flourish Research
San Antonio, Texas, 78229, United States
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Collaborative Neuroscience Research, LLC
Los Alamitos, California, 90720, United States
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DBC Research USA
Pembroke Pines, Florida, 33029, United States
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DFW Clinical Research
Dallas, Texas, 75240, United States
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DM Clinical Research, Martin Diagnostic Clinic
Tomball, Texas, 77375, United States
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Diablo Clinical Research, Inc.
Walnut Creek, California, 94598, United States
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Duke Vaccine and Trials Unit
Durham, North Carolina, 27703, United States
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East-West Medical Research Institute
Honolulu, Hawaii, 96814, United States
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Entrust Clinical Research
Miami, Florida, 33176, United States
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Finlay Medical Research
Greenacres City, Florida, 33467, United States
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Foothills Research Center/ CCT Research
Phoenix, Arizona, 85044, United States
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Gerardo Polanco, MD
Miami, Florida, 33156, United States
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Great Lakes Clinical Trials - Ravenswood
Chicago, Illinois, 60640, United States
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HOPE Research Institute
Phoenix, Arizona, 85032, United States
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Headlands Horizons, LLC dba Headlands Research-Brownsville
Brownsville, Texas, 78526, United States
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Headlands Research - Detroit
Southfield, Michigan, 48034, United States
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Health Research of Hampton Roads, Inc.
Newport News, Virginia, 23606, United States
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Hope Clinical Research, Inc.
Canoga Park, California, 91303, United States
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IMA Clinical Research San Antonio
San Antonio, Texas, 78229, United States
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IMA Clinical Research Warren
Warren Township, New Jersey, 07059, United States
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Indago Research & Health Center, Inc
Hialeah, Florida, 33012, United States
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Innovation Medical Research Center
Palmetto Bay, Florida, 33157, United States
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Internal Medicine and Pediatric Associates of Bristol
Bristol, Tennessee, 37620, United States
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J. Lewis Research, Inc. / Foothill Family Clinic South
Salt Lake City, Utah, 84121, United States
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Jadestone Clinical Research
Silver Spring, Maryland, 20904, United States
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Koch Family Medicine
Morton, Illinois, 61550, United States
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Las Vegas Clinical Trials
North Las Vegas, Nevada, 89030, United States
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Lynn Health Science Institute
Oklahoma City, Oklahoma, 73112, United States
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M3 Wake Research, Inc.
Raleigh, North Carolina, 27612, United States
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McGill Family Practice
Papillion, Nebraska, 68046, United States
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Miami Clinical Research
Miami, Florida, 33155, United States
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Miami Dade Medical Research Institute, LLC
Miami, Florida, 33176, United States
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Monroe Biomedical Research
Monroe, North Carolina, 28112, United States
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New Phase Research and Development
Knoxville, Tennessee, 37909, United States
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North Alabama Research Center
Athens, Alabama, 35611, United States
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Northwest Houston Heart Center
Tomball, Texas, 77375, United States
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Orange County Research Center
Lake Forest, California, 92630, United States
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Orion Clinical Research
Austin, Texas, 78759, United States
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Palm Springs Community Health Center
Miami Lakes, Florida, 33014, United States
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Pharmaron
Baltimore, Maryland, 21201, United States
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Proactive Clinical Research,LLC
Fort Lauderdale, Florida, 33308, United States
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Quality Clinical Research
Omaha, Nebraska, 68114, United States
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Research Institute of South Florida
Miami, Florida, 33173, United States
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Revival Research Institute, LLC
Sterling Heights, Michigan, 48312, United States
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Rochester Clinical Research, LLC
Rochester, New York, 14609, United States
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SMS Clinical Research
Mesquite, Texas, 75149, United States
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Saint Louis University Center for Vaccine Development
St Louis, Missouri, 63104, United States
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Santa Clara Family Clinic
Houston, Texas, 77087, United States
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Scottsdale Clinical Trials
Scottsdale, Arizona, 85260, United States
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Solaris Clinical Research
Meridian, Idaho, 83646, United States
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Sundance Clinical Research
St Louis, Missouri, 63141, United States
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Synexus Clinical Research US, Inc.
Vista, California, 92083, United States
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Synexus Clinical Research US, Inc.
Chicago, Illinois, 60602, United States
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Synexus Clinical Research US, Inc.
Cincinnati, Ohio, 45236, United States
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Tampa Bay Medical Research
Clearwater, Florida, 33761, United States
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Tekton Research, LLC.
Austin, Texas, 78745, United States
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Texas Health Family Care
Fort Worth, Texas, 76135, United States
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Trial Management Associates
Myrtle Beach, South Carolina, 29572, United States
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Trial Management Associates - Wilmington - Floral Parkway
Wilmington, North Carolina, 28403, United States
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Trial Management Associates, LLC
Wilmington, North Carolina, 28403, United States
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Trial Management Associates, LLC
Myrtle Beach, South Carolina, 29572, United States
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Universal Axon Clinical Research, LLC
Doral, Florida, 33166, United States
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Velocity Clinical Research, Boise
Meridian, Idaho, 83642, United States
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Velocity Clinical Research, Cincinnati, Mt. Auburn
Cincinnati, Ohio, 45219, United States
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Velocity Clinical Research, Grand Island
Grand Island, Nebraska, 68803, United States
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Velocity Clinical Research, Medford
Medford, Oregon, 97504, United States
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Velocity Clinical Research, Omaha
Omaha, Nebraska, 68134, United States
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Velocity Clinical Research, Salt Lake City
West Jordan, Utah, 84088, United States
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Velocity Clinical Research, Sioux City
Sioux City, Iowa, 51106, United States
More trials for these conditions
Other studies related to the condition(s) this trial covers.
- Home antibody tests put to the test: can you read your own COVID-19 result?
- Can lung ultrasound reveal COVID-19's signature in the lungs?
- When the immune system Can't fight back: tracking three respiratory viruses
- Flu's journey: scientists track how influenza passes between people
- The household maze: how does COVID-19 move between family members?
- Can an oral drug stop COVID-19 from turning deadly?