ClinicalTrials.gov record
A Study on the Efficacy of a Vaccine Against Influenza in Adults ≥65 Years of Age
ClinicalTrials.gov ID: NCT07805707
Public ClinicalTrials.gov record NCT07805707. 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.
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-Blind, Controlled Study to Evaluate the Clinical Efficacy of an mRNA Based Seasonal Influenza Vaccine in Older Adults ≥65 Years of Age
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
This study will compare an investigational mRNA flu vaccine with a licensed flu vaccine in adults 65 years of age and older. Participants will receive one injection and will be followed during the flu season. The study will measure prevention of laboratory-confirmed flu illness, side effects, and immune responses.
Study identification
- NCT ID
- NCT07805707
- Recruitment status
- Recruiting
- Study type
- Interventional
- Phase
- Phase 3
- Enrollment
- 54,000 participants
Conditions and interventions
Conditions
Interventions
- mRNA Seasonal Flu vaccine Combination Product
- Licensed Influenza Vaccine Combination Product
Combination Product
Eligibility (public fields only)
- Age range
- 65 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 1, 2026
- Primary completion
- Jun 8, 2028
- Completion
- Jun 8, 2028
- Last update posted
- Sep 17, 2026
2026 – 2028
United States locations
- U.S. sites
- 161
- U.S. states
- 34
- U.S. cities
- 131
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| GSK Investigational Site | Anniston | Alabama | 36207 | Recruiting |
| GSK Investigational Site | Guntersville | Alabama | 35976-2206 | Recruiting |
| GSK Investigational Site | Glendale | Arizona | 85308 | Recruiting |
| GSK Investigational Site | Mesa | Arizona | 85206 | Recruiting |
| GSK Investigational Site | Mesa | Arizona | 85213 | Recruiting |
| GSK Investigational Site | Phoenix | Arizona | 85014 | Recruiting |
| GSK Investigational Site | Phoenix | Arizona | 85032 | Recruiting |
| GSK Investigational Site | Scottsdale | Arizona | 85250 | Recruiting |
| GSK Investigational Site | Scottsdale | Arizona | 85255 | Recruiting |
| GSK Investigational Site | Sun City | Arizona | 85351-2146 | Recruiting |
| GSK Investigational Site | Tempe | Arizona | 85283-1527 | Recruiting |
| GSK Investigational Site | Tempe | Arizona | 85284 | Recruiting |
| GSK Investigational Site | Tucson | Arizona | 85711 | Recruiting |
| GSK Investigational Site | Tucson | Arizona | 85712 | Recruiting |
| GSK Investigational Site | Little Rock | Arkansas | 72204 | Recruiting |
| GSK Investigational Site | Little Rock | Arkansas | 72205 | Recruiting |
| GSK Investigational Site | Dublin | California | 94568-2453 | Recruiting |
| GSK Investigational Site | Escondido | California | 92025 | Recruiting |
| GSK Investigational Site | Fair Oaks | California | 95628 | Recruiting |
| GSK Investigational Site | La Palma | California | 90623 | Recruiting |
| GSK Investigational Site | Redding | California | 96001 | Recruiting |
| GSK Investigational Site | Riverside | California | 92503 | Recruiting |
| GSK Investigational Site | Rolling Hills Estates | California | 90274-3664 | Recruiting |
| GSK Investigational Site | San Bernardino | California | 92408 | Recruiting |
| GSK Investigational Site | San Diego | California | 92103 | Recruiting |
| GSK Investigational Site | Walnut Creek | California | 94598 | Recruiting |
| GSK Investigational Site | Aurora | Colorado | 80012 | Recruiting |
| GSK Investigational Site | Colorado Springs | Colorado | 80909 | Recruiting |
| GSK Investigational Site | Stamford | Connecticut | 06905 | Recruiting |
| GSK Investigational Site | Waterbury | Connecticut | 06708 | Recruiting |
| GSK Investigational Site | Altamonte Springs | Florida | 32701 | Recruiting |
| GSK Investigational Site | Fort Lauderdale | Florida | 33308 | Recruiting |
| GSK Investigational Site | Hialeah | Florida | 33012 | Recruiting |
| GSK Investigational Site | Hialeah | Florida | 33016 | Recruiting |
| GSK Investigational Site | Homestead | Florida | 33030 | Recruiting |
| GSK Investigational Site | Lake Mary | Florida | 32720 | Recruiting |
| GSK Investigational Site | Lake Worth | Florida | 33462 | Recruiting |
| GSK Investigational Site | Maitland | Florida | 32751 | Recruiting |
| GSK Investigational Site | Melbourne | Florida | 32934-8172 | Recruiting |
| GSK Investigational Site | Miami | Florida | 33125 | Recruiting |
| GSK Investigational Site | Miami | Florida | 33126-2073 | Recruiting |
| GSK Investigational Site | Miami | Florida | 33130 | Recruiting |
| GSK Investigational Site | Miami | Florida | 33134 | Recruiting |
| GSK Investigational Site | Miami | Florida | 33135 | Recruiting |
| GSK Investigational Site | Miami | Florida | 33174 | Recruiting |
| GSK Investigational Site | Miami | Florida | 33176 | Recruiting |
| GSK Investigational Site | Miami | Florida | 33182-1420 | Recruiting |
| GSK Investigational Site | Miami | Florida | 33186 | Recruiting |
| GSK Investigational Site | Miami | Florida | 33276 | Recruiting |
| GSK Investigational Site | Miami Lakes | Florida | 33016-1597 | Recruiting |
| GSK Investigational Site | Miami Lakes | Florida | 33016 | Recruiting |
| GSK Investigational Site | Orlando | Florida | 32803 | Recruiting |
| GSK Investigational Site | Orlando | Florida | 32806 | Recruiting |
| GSK Investigational Site | Palmetto Bay | Florida | 33157 | Recruiting |
| GSK Investigational Site | Port Orange | Florida | 32127-5169 | Recruiting |
| GSK Investigational Site | Tamarac | Florida | 33321 | Recruiting |
| GSK Investigational Site | Tampa | Florida | 33614 | Recruiting |
| GSK Investigational Site | Tampa | Florida | 33615 | Recruiting |
| GSK Investigational Site | The Villages | Florida | 32162 | Recruiting |
| GSK Investigational Site | West Palm Beach | Florida | 33409 | Recruiting |
| GSK Investigational Site | Albany | Georgia | 31707 | Recruiting |
| GSK Investigational Site | Atlanta | Georgia | 30281 | Recruiting |
| GSK Investigational Site | Atlanta | Georgia | 30328 | Recruiting |
| GSK Investigational Site | Decatur | Georgia | 30030 | Recruiting |
| GSK Investigational Site | Marietta | Georgia | 30060 | Recruiting |
| GSK Investigational Site | Riverdale | Georgia | 30274 | Recruiting |
| GSK Investigational Site | Savannah | Georgia | 31406 | Recruiting |
| GSK Investigational Site | Meridian | Idaho | 83642-3154 | Recruiting |
| GSK Investigational Site | Chicago | Illinois | 60607-4911 | Recruiting |
| GSK Investigational Site | Morton | Illinois | 61550 | Recruiting |
| GSK Investigational Site | Peoria | Illinois | 61614 | Recruiting |
| GSK Investigational Site | Valparaiso | Indiana | 46383 | Recruiting |
| GSK Investigational Site | Kansas City | Kansas | 66112 | Recruiting |
| GSK Investigational Site | Lenexa | Kansas | 66219 | Recruiting |
| GSK Investigational Site | Lafayette | Louisiana | 70508 | Recruiting |
| GSK Investigational Site | Metairie | Louisiana | 70006 | Recruiting |
| GSK Investigational Site | New Orleans | Louisiana | 70115 | Recruiting |
| GSK Investigational Site | Baltimore | Maryland | 21208 | Recruiting |
| GSK Investigational Site | Boston | Massachusetts | 02131 | Recruiting |
| GSK Investigational Site | Brookline | Massachusetts | 02446 | Recruiting |
| GSK Investigational Site | Garden City | Michigan | 48135 | Recruiting |
| GSK Investigational Site | Southfield | Michigan | 48034 | Recruiting |
| GSK Investigational Site | Southfield | Michigan | 48075 | Recruiting |
| GSK Investigational Site | Gulfport | Mississippi | 39503 | Recruiting |
| GSK Investigational Site | Chesterfield | Missouri | 63005 | Recruiting |
| GSK Investigational Site | St Louis | Missouri | 63141-6282 | Recruiting |
| GSK Investigational Site | St Louis | Missouri | 63141 | Recruiting |
| GSK Investigational Site | Elkhorn | Nebraska | 68022 | Recruiting |
| GSK Investigational Site | Grand Island | Nebraska | 68803 | Recruiting |
| GSK Investigational Site | Norfolk | Nebraska | 68701-7701 | Recruiting |
| GSK Investigational Site | Omaha | Nebraska | 68114 | Recruiting |
| GSK Investigational Site | Las Vegas | Nevada | 89106 | Recruiting |
| GSK Investigational Site | Las Vegas | Nevada | 89109 | Recruiting |
| GSK Investigational Site | Warren Township | New Jersey | 07059-2730 | Recruiting |
| GSK Investigational Site | Santa Fe | New Mexico | 87505 | Recruiting |
| GSK Investigational Site | Hartsdale | New York | 10530 | Recruiting |
| GSK Investigational Site | Rochester | New York | 14609 | Recruiting |
| GSK Investigational Site | Charlotte | North Carolina | 28210 | Recruiting |
| GSK Investigational Site | Denver | North Carolina | 80110 | Recruiting |
| GSK Investigational Site | Durham | North Carolina | 27704 | Recruiting |
| GSK Investigational Site | Fayetteville | North Carolina | 30214 | Recruiting |
| GSK Investigational Site | Greensboro | North Carolina | 27408 | Recruiting |
| GSK Investigational Site | Hickory | North Carolina | 28601 | Recruiting |
| GSK Investigational Site | Raleigh | North Carolina | 27527 | Recruiting |
| GSK Investigational Site | Salisbury | North Carolina | 28144 | Recruiting |
| GSK Investigational Site | Wilmington | North Carolina | 28403 | Recruiting |
| GSK Investigational Site | Winston-Salem | North Carolina | 27103 | Recruiting |
| GSK Investigational Site | Blue Ash | Ohio | 45242-3763 | Recruiting |
| GSK Investigational Site | Cincinnati | Ohio | 45246 | Recruiting |
| GSK Investigational Site | Columbus | Ohio | 43213 | Recruiting |
| GSK Investigational Site | Lima | Ohio | 45801 | Recruiting |
| GSK Investigational Site | Chickasha | Oklahoma | 73018-2738 | Recruiting |
| GSK Investigational Site | Oklahoma City | Oklahoma | 73111 | Recruiting |
| GSK Investigational Site | Tulsa | Oklahoma | 74133 | Recruiting |
| GSK Investigational Site | Portland | Oregon | 97210-5311 | Recruiting |
| GSK Investigational Site | Camp Hill | Pennsylvania | 17011 | Recruiting |
| GSK Investigational Site | Philadelphia | Pennsylvania | 19107 | Recruiting |
| GSK Investigational Site | Anderson | South Carolina | 29621-4822 | Recruiting |
| GSK Investigational Site | Little River | South Carolina | 29569 | Recruiting |
| GSK Investigational Site | Myrtle Beach | South Carolina | 29572 | Recruiting |
| GSK Investigational Site | North Charleston | South Carolina | 29405 | Recruiting |
| GSK Investigational Site | Spartanburg | South Carolina | 29301 | Recruiting |
| GSK Investigational Site | Knoxville | Tennessee | 37909 | Recruiting |
| GSK Investigational Site | Knoxville | Tennessee | 37912 | Recruiting |
| GSK Investigational Site | Austin | Texas | 78704 | Recruiting |
| GSK Investigational Site | Austin | Texas | 78705-3214 | Recruiting |
| GSK Investigational Site | Brownsville | Texas | 78526 | Recruiting |
| GSK Investigational Site | Carrollton | Texas | 75006-2139 | Recruiting |
| GSK Investigational Site | Cypress | Texas | 77429 | Recruiting |
| GSK Investigational Site | Dallas | Texas | 75230 | Recruiting |
| GSK Investigational Site | Dallas | Texas | 75243-1921 | Recruiting |
| GSK Investigational Site | DeSoto | Texas | 75115 | Recruiting |
| GSK Investigational Site | Edinburg | Texas | 78539-3432 | Recruiting |
| GSK Investigational Site | El Paso | Texas | 79902 | Recruiting |
| GSK Investigational Site | Fort Worth | Texas | 76135 | Recruiting |
| GSK Investigational Site | Friendswood | Texas | 77546 | Recruiting |
| GSK Investigational Site | Garland | Texas | 75043 | Recruiting |
| GSK Investigational Site | Houston | Texas | 77008 | Recruiting |
| GSK Investigational Site | Houston | Texas | 77040 | Recruiting |
| GSK Investigational Site | Houston | Texas | 77065 | Recruiting |
| GSK Investigational Site | Houston | Texas | 77081 | Recruiting |
| GSK Investigational Site | Houston | Texas | 77087 | Recruiting |
| GSK Investigational Site | Irving | Texas | 75061 | Recruiting |
| GSK Investigational Site | Keller | Texas | 76248 | Recruiting |
| GSK Investigational Site | Laredo | Texas | 78041 | Recruiting |
| GSK Investigational Site | McKinney | Texas | 75071 | Recruiting |
| GSK Investigational Site | Mesquite | Texas | 75149 | Recruiting |
| GSK Investigational Site | Pearland | Texas | 77584 | Recruiting |
| GSK Investigational Site | Plano | Texas | 75093 | Recruiting |
| GSK Investigational Site | San Antonio | Texas | 78527 | Recruiting |
| GSK Investigational Site | Stephenville | Texas | 76401 | Recruiting |
| GSK Investigational Site | The Woodlands | Texas | 77384 | Recruiting |
| GSK Investigational Site | Salt Lake City | Utah | 84107 | Recruiting |
| GSK Investigational Site | South Ogden | Utah | 84405-4869 | Recruiting |
| GSK Investigational Site | West Jordan | Utah | 84088 | Recruiting |
| GSK Investigational Site | Charlottesville | Virginia | 22911 | Recruiting |
| GSK Investigational Site | Newport News | Virginia | 23606 | Recruiting |
| GSK Investigational Site | Norfolk | Virginia | 23502-3931 | Recruiting |
| GSK Investigational Site | Richmond | Virginia | 23226 | Recruiting |
| GSK Investigational Site | Renton | Washington | 98057 | Recruiting |
| GSK Investigational Site | Seattle | Washington | 98104-2725 | Recruiting |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT07805707, 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 Sep 17, 2026 · Synced Sep 27, 2026
Related: full search, browse by condition, browse by drug or therapy, browse by sponsor, browse by U.S. city.
Open the official record
The complete protocol, eligibility criteria, and contact information for NCT07805707 live on ClinicalTrials.gov.