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Licensed Seasonal Influenza Vaccine

Phase 1

Influenza, Human+COVID-19 | Monoclonal antibody | Infectious Disease |GSK plc|Last Updated: Jun 30, 2026

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindACTIVE_CONTROLLEDDMC
Total Trials1
Total Enrollment225

FDA Designations

No designations recorded

Clinical trial landscape

Licensed Seasonal Influenza Vaccine · 1 trial · 1 indication

Phase 1 1
NCT07464314A Study on the Safety and Immune Response of Investigational mRNA Seasonal Flu/COVID-19 Combination Vaccine in AdultsInfluenza, Human+COVID-19
RECRUITING225 Analytics
PHASE1RECRUITING
A Study on the Safety and Immune Response of Investigational mRNA Seasonal Flu/COVID-19 Combination Vaccine in Adults
Influenza, Human+COVID-19Unlock trial analytics

Study Endpoints

Primary Endpoints

Number of Participants with an Increase in Toxicity Grade of Laboratory Value Abnormalities Following Administration of the Study Intervention
Day 1 to Day 3

The assessed toxicity grades for laboratory value abnormalities will be defined as follows: Grade 1 = Mild, Grade 2 = Moderate, Grade 3 = Severe, and Grade 4 = Potentially life-threatening.

Number of Participants with an Increase in Toxicity Grade of Laboratory Value Abnormalities following Administration of Study Intervention
Day 1 to Day 8
Number of Participants with Solicited Administration Site Adverse Events (AEs)
Day 1 to Day 7

The solicited administration site AEs considered are pain, redness, swelling and lymphadenopathy.

Number of Participants with Solicited Systemic AEs
Day 1 to Day 7

The solicited systemic AEs considered are fever, headache, fatigue, myalgia, arthralgia and chills.

Number of Participants with Unsolicited AEs
Day 1 to Day 28

An unsolicited AE is an AE that was either not included in the list of solicited events or could be included in the list of solicited events but with an onset outside the specified period of follow-up for solicited events.

Number of Participants with Serious Adverse Events (SAEs)
Day 1 to Day 181

A SAE is an AE which results in death, is life-threatening, requires inpatient hospitalization or prolongation of existing hospitalization, results in disability/incapacity, or other situations that are considered serious per medical or scientific judgment.

Number of Participants with Adverse Events of Special Interest (AESIs)
Day 1 to Day 181

The following events are considered as AESI in this study: severe hypersensitivity reactions within 24 hours after study intervention administration, Aminotransferase elevation; myocarditis/pericarditis within 6 weeks after study intervention administration and potential immune-mediated diseases (pIMDs).

Number of Participants with Medically Attended Adverse Events (MAAEs)
Day 1 to Day 181

A MAAE is an AE for which the participant received medical attention including any symptom or illness requiring hospitalization, or an emergency room visit, or visit to/by a healthcare professional.

Secondary Endpoints

Geometric Mean Titer (GMT) Of Antigen 1 Titer
At Day 29
Percentage of Participants with Antigen 1 Seroconversion Rate (SCR)
Day 1 to Day 29
Percentage of Participants with Antigen 1 Seroprotection Rate (SPR)
At Day 1 and Day 29
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Study Design & Arms

AllocationRANDOMIZED
MaskingTRIPLE
ModelSEQUENTIAL
PurposePREVENTION

Treatment Arms

ArmTypeDescription
FLU/COVm_Dose Level 1EXPERIMENTALParticipants receive a single intramuscular administration of the investigational mRNA Seasonal Flu/COVID-19 combination vaccine at dose level 1 (Lowest dose).
FLU/COVm_Dose Level 2EXPERIMENTALParticipants receive a single intramuscular administration of the investigational mRNA Seasonal Flu/COVID-19 combination vaccine at dose level 2 (Medium dose).
FLU/COVm_Dose Level 3EXPERIMENTALParticipants receive a single intramuscular administration of the investigational mRNA Seasonal Flu/COVID-19 combination vaccine at dose level 3 (Highest dose).
Licensed Seasonal Influenza Vaccine GroupACTIVE_COMPARATORParticipants receive a single intramuscular administration of a licensed seasonal Flu vaccine.
Licensed COVID-19 Vaccine GroupACTIVE_COMPARATORParticipants receive a single intramuscular administration of a licensed COVID-19 vaccine.

Interventions

NameTypeDescription
Investigational mRNA Seasonal Flu/COVID-19 Combination (Flu/COVm) VaccineBIOLOGICALFlu/COVm Vaccine with multiple dose levels (Dose Level 1, Dose Level 2, and Dose Level 3), will be administered via single intramuscular injection.
Licensed Seasonal Influenza VaccineBIOLOGICALLicense Seasonal Influenza Vaccine will be administered as a single intramuscular dose.
Licensed COVID-19 VaccineBIOLOGICALLicensed COVID-19 Vaccine will be administered as a single intramuscular dose.
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Eligibility Criteria

Age Range65 Years to 85 Years
SexALL
Healthy VolunteersNo
Study Sites12

Inclusion Criteria: 1. Participants, who, in the opinion of the investigator, can and will comply with the requirements of the protocol independently or with the assistance of the caregiver. 2. Informed consent obtained from the participant prior to performance of any study-specific procedure. 3. A...

Countries:United States
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Recent Changes (Last 90 Days)

HIGHJun 30, 2026NCT07464314Status: ACTIVE_NOT_RECRUITING → RECRUITING
HIGHJun 30, 2026NCT07464314Status: ACTIVE_NOT_RECRUITING → RECRUITING
HIGHJun 30, 2026NCT07464314Status: ACTIVE_NOT_RECRUITING → RECRUITING
MEDIUMJun 22, 2026NCT07464314Status: RECRUITING → ACTIVE_NOT_RECRUITING
MEDIUMJun 22, 2026NCT07464314Status: RECRUITING → ACTIVE_NOT_RECRUITING

Frequently asked questions about Licensed Seasonal Influenza Vaccine

What is Licensed Seasonal Influenza Vaccine used for?

Licensed Seasonal Influenza Vaccine is an investigational mRNA combination vaccine being studied for the prevention of influenza and COVID-19 in adults. It is designed to target both seasonal flu and SARS-CoV-2, the virus that causes COVID-19, in a single vaccine.

Who makes Licensed Seasonal Influenza Vaccine?

Licensed Seasonal Influenza Vaccine is being developed by GSK plc, a global biopharma company listed on the London Stock Exchange under the ticker GSK. The company is currently conducting a Phase 1 clinical trial to evaluate the vaccine's safety and immune response.

What phase is Licensed Seasonal Influenza Vaccine in?

Licensed Seasonal Influenza Vaccine is in Phase 1 clinical development. It is an investigational vaccine that has not yet been approved by regulatory authorities. The ongoing Phase 1 trial is recruiting participants to assess its safety and immunogenicity.

What clinical trials is Licensed Seasonal Influenza Vaccine in?

Licensed Seasonal Influenza Vaccine is being evaluated in a single Phase 1 trial with the identifier NCT07464314. This randomized, double-blind, active-controlled study is enrolling 225 adults aged 65 years and older in the United States to assess the safety and immune response of the mRNA seasonal flu/COVID-19 combination vaccine.

How does Licensed Seasonal Influenza Vaccine work?

Licensed Seasonal Influenza Vaccine is an mRNA-based vaccine that works by delivering genetic instructions to cells to produce antigens from both influenza viruses and SARS-CoV-2. This stimulates the immune system to produce protective antibodies against both pathogens, potentially offering combined protection against seasonal flu and COVID-19.