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Licensed Seasonal Influenza Vaccine

Phase 1

Influenza, Human+COVID-19 | Monoclonal antibody | Infectious Disease |GSK plc|Last Updated: Mar 27, 2026

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
RandomizedDouble-BlindACTIVE_CONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment225
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT07464314A Study on the Safety and Immune Response of Investigational mRNA Seasonal Flu/COVID-19 Combination Vaccine in AdultsPHASE1 RECRUITING 225Mar 9, 2026Jun 3, 2027Mar 27, 20262 United States
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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 — 85 Years
SexALL
Healthy VolunteersNo
Study Sites2

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)
MEDIUMMay 26, 2026NCT07464314Status: NOT_YET_RECRUITING → RECRUITING
LOWMay 24, 2026NCT07464314studyFirstPostDate: changed