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Investigational Influenza Vaccine

Phase 1

Influenza | Monoclonal antibody | Infectious Disease |BioNTech SE|Last Updated: Aug 19, 2026

Success Probability

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Trial Design

RandomizedDouble-BlindACTIVE_CONTROLLEDDMC
Total Trials1
Total Enrollment2,650

FDA Designations

No designations recorded

Clinical trial landscape

Investigational Influenza Vaccine · 2 trials · 4 indications

Phase 1 2
NCT06821061A Study to Learn About How the Flu and COVID-19 Vaccines Act in Healthy PeopleInfluenza
COMPLETED2,650 Analytics
NCT06683352A Study to Learn About Flu and COVID-19 Vaccine Responses in Healthy PeopleInfluenza,Human
COMPLETED1,353 Analytics
PHASE1COMPLETED
A Study to Learn About How the Flu and COVID-19 Vaccines Act in Healthy People
InfluenzaUnlock trial analytics
PHASE1COMPLETED
A Study to Learn About Flu and COVID-19 Vaccine Responses in Healthy People
Influenza,HumanUnlock trial analytics

Study Endpoints

Primary Endpoints

Percentage of participants reporting prompted local reactions within 7 days following investigational product administration
Day 7
Percentage of participants reporting prompted systemic events within 7 days following investigational product administration
Day 7
Percentage of participants reporting adverse events (AEs) through 1 month following investigational product administration
1 month
Percentage of participants reporting serious adverse events (SAEs) through 6 months following investigational product administration
6 months
Cohort 1: Percentage of Participants With Any Local Reactions for up to 7 Days Following Vaccination
From Day 1 through Day 7 after Vaccination [Vaccination on Day 1]

Local reactions included redness, swelling, and pain at the injection site, were recorded in the electronic dairy (e-diary) or case report form (CRF) after vaccination. Local reactions were graded per the 'Local Reaction Grading Scale' per protocol. Percentage of participants with at least 1 local reaction of grade 1 and above were reported in this outcome measure.

Cohort 2: Percentage of Participants With Any Local Reactions for up to 7 Days Following Vaccination
From Day 1 through Day 7 after Vaccination [Vaccination on Day 1]

Local reactions included redness, swelling, and pain at the injection site, were recorded in the e-diary or CRF after vaccination. Local reactions were graded per the 'Local Reaction Grading Scale' per protocol. Percentage of participants with at least 1 local reaction of grade 1 and above were reported in this outcome measure.

Cohort 1: Percentage of Participants With Any Systemic Events for up to 7 Days Following Vaccination
From Day 1 through Day 7 after Vaccination [Vaccination on Day 1]

Systemic Events: fever, diarrhea, vomiting, headache, fatigue/tiredness, chills, new or worsened muscle pain, and new or worsened joint pain, were recorded in the e-diary or CRF after vaccination. Systemic events were graded per the 'Systemic Events Grading Scale' per protocol. Percentage of participants with at least 1 systemic event of grade 1 and above were reported in this outcome measure.

Cohort 2: Percentage of Participants With Any Systemic Events for up to 7 Days Following Vaccination
From Day 1 through Day 7 after Vaccination [Vaccination on Day 1]

Systemic Events: fever, diarrhea, vomiting, headache, fatigue/tiredness, chills, new or worsened muscle pain, and new or worsened joint pain, were recorded in the e-diary or CRF after vaccination. Systemic events were graded per the 'Systemic Events Grading Scale' per protocol. Percentage of participants with at least 1 systemic event of grade 1 and above were reported in this outcome measure.

Cohort 1: Percentage of Participants Reporting Adverse Events (AEs) From Vaccination Through 1 Month After Vaccination
From Vaccination on Day 1 through 1 month after Vaccination [Vaccination on Day 1]

An AE was defined as any untoward medical occurrence in a participant temporally associated with the use of study intervention, whether or not considered related to the study intervention. AEs included both serious and all non-serious AEs. Serious AE (SAE) was defined as any untoward medical occurrence that, at any dose, met one or more of the following criteria - resulted in death, was life-threatening, required inpatient hospitalization or prolongation of existing hospitalization, resulted in persistent or significant disability/incapacity, was a congenital anomaly/birth defect, any other pre-specified criteria in protocol of the study or other important medical event. Only AEs collected by non-systematic assessment (excluding local reactions and systematic events) were included in this outcome measure.

Cohort 2: Percentage of Participants Reporting AEs From Vaccination Through 1 Month After Vaccination
From Vaccination on Day 1 through 1 month after Vaccination [Vaccination on Day 1]

An AE was defined as any untoward medical occurrence in a participant temporally associated with the use of study intervention, whether or not considered related to the study intervention. AEs included both serious and all non-serious AEs. SAE was defined as any untoward medical occurrence that, at any dose, met one or more of the following criteria - resulted in death, was life-threatening, required inpatient hospitalization or prolongation of existing hospitalization, resulted in persistent or significant disability/incapacity, was a congenital anomaly/birth defect, any other pre-specified criteria in protocol of the study or other important medical event. Only AEs collected by non-systematic assessment (excluding local reactions and systematic events) were included in this outcome measure.

Cohort 1: Percentage of Participants Reporting SAEs From Vaccination Through 6 Months After Vaccination
From Vaccination on Day 1 through 6 Months after Vaccination [Vaccination on Day 1]

SAE was defined as any untoward medical occurrence that, at any dose, met one or more of the following criteria - resulted in death, was life-threatening, required inpatient hospitalization or prolongation of existing hospitalization, resulted in persistent or significant disability/incapacity, was a congenital anomaly/birth defect, and any other pre-specified criteria in protocol of the study or other important medical event. Only SAEs collected by non-systematic assessment (excluding local reactions and systematic events \[if any\]) were included in this outcome measure.

Cohort 2: Percentage of Participants Reporting SAEs From Vaccination Through 6 Months After Vaccination
From Vaccination on Day 1 through 6 Months after Vaccination [Vaccination on Day 1]

SAE was defined as any untoward medical occurrence that, at any dose, met one or more of the following criteria - resulted in death, was life-threatening, required inpatient hospitalization or prolongation of existing hospitalization, resulted in persistent or significant disability/incapacity, was a congenital anomaly/birth defect, and any other pre-specified criteria in protocol of the study or other important medical event. Only SAEs collected by non-systematic assessment (excluding local reactions and systematic events \[if any\]) were included in this outcome measure.

Secondary Endpoints

GMTs before and through 1 month following investigational product administration
Before vaccination through to 1 month after vaccination
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposePREVENTION

Treatment Arms

ArmTypeDescription
Arm AEXPERIMENTALLow Dose COVID-19 Vaccine (1a)
Arm BEXPERIMENTALLow Dose COVID-19 Vaccine ( 1b)
Arm CEXPERIMENTALLow Dose COVID-19 Vaccine ( 1c)
Arm DEXPERIMENTALInvestigational Influenza and COVID-19 Combination Vaccine (High Dose Combination 1)
Arm EEXPERIMENTALInvestigational Influenza and COVID-19 Combination Vaccine (Medium Dose Combination 2)
Arm FEXPERIMENTALInvestigational Influenza and COVID-19 Combination Vaccine (High Dose Combination 3)
Arm GEXPERIMENTALInvestigational Influenza and COVID-19 Combination Vaccine (High Dose Combination 4)
Arm HACTIVE_COMPARATORLicensed COVID-19 Vaccine
Arm IACTIVE_COMPARATORLicensed Influenza Vaccine (1)
Arm JEXPERIMENTALInvestigational Influenza and COVID-19 Combination Vaccine (High Dose Combination 5)
Arm KEXPERIMENTALInvestigational Influenza and COVID-19 Combination Vaccine (High Dose Combination 6)
Arm LEXPERIMENTALInvestigational Influenza and COVID-19 Combination Vaccine (High Dose Combination 7)
Arm MACTIVE_COMPARATORLicensed COVID-19 Vaccine
Arm NACTIVE_COMPARATORLicensed Influenza Vaccine (2)
Arm AAEXPERIMENTALInvestigational Influenza and COVID-19 Combination Vaccine (High Dose Combination 6)
Arm BBEXPERIMENTALInvestigational Influenza and COVID-19 Combination Vaccine (High Dose Combination 4)
Arm CCEXPERIMENTALInvestigational Influenza and COVID-19 Combination Vaccine (High Dose Combination 7)
Arm DDEXPERIMENTALInvestigational Influenza and COVID-19 Combination Vaccine (Medium Dose Combination 2)
Arm EEEXPERIMENTALInvestigational Influenza and COVID-19 Combination Vaccine (High Dose Combination 3)
Arm FFACTIVE_COMPARATORLicensed COVID-19 Vaccine
Arm GGACTIVE_COMPARATORLicensed Influenza Vaccine (3)
Arm HHACTIVE_COMPARATORLicensed Influenza Vaccine (2)
Arm IIEXPERIMENTALLow Dose COVID-19 Vaccine ( 1b)
Arm JJEXPERIMENTALLow Dose COVID-19 Vaccine ( 1c)
Arm KKEXPERIMENTALInvestigational Influenza and COVID-19 Combination Vaccine (High Dose Combination 4)
Arm LLEXPERIMENTALInvestigational Influenza and COVID-19 Combination Vaccine (High Dose Combination 7)
Arm MMEXPERIMENTALInvestigational Influenza and COVID-19 Combination Vaccine (Medium Dose Combination 2)
Arm NNEXPERIMENTALInvestigational Influenza and COVID-19 Combination Vaccine (High Dose Combination 3)
Arm OOEXPERIMENTALInvestigational Influenza and COVID-19 Combination Vaccine (High Dose Combination 5)
Arm PPEXPERIMENTALMedium Dose Investigational Influenza Vaccine (1)
Arm QQEXPERIMENTALHigh Dose Investigational Influenza Vaccine (2)
Arm RRACTIVE_COMPARATORLicensed COVID-19 Vaccine
Arm SSACTIVE_COMPARATORLicensed Influenza Vaccine (3)
Arm A/AAEXPERIMENTALLow Dose COVID-19 Vaccine and Placebo
Arm B/BBEXPERIMENTALMedium Dose COVID-19 Vaccine and Placebo
Arm C/CCACTIVE_COMPARATORHigh Dose COVID-19 Vaccine and Placebo
Arm D/DDEXPERIMENTALLow Dose Investigational Influenza Vaccine and Placebo
Arm F/FFEXPERIMENTALMedium Dose Investigational Influenza Vaccine and Placebo
Arm G/GGEXPERIMENTALLow Dose Investigational Influenza Vaccine/Medium Dose COVID-19 Vaccine and Placebo
Arm H/HHEXPERIMENTALMedium Dose Investigational Influenza Vaccine/Low Dose COVID-19 Vaccine and Placebo
Arm I/IIEXPERIMENTALLow Dose Investigational Influenza Vaccine/High Dose COVID-19 Vaccine and Placebo
Arm J/JJEXPERIMENTALHigh Dose Investigational Influenza Vaccine and Placebo
Arm K/KKEXPERIMENTALMedium Dose Investigational Influenza Vaccine/Medium Dose COVID-19 Vaccine and Placebo
Arm L/LLEXPERIMENTALMedium Dose Investigational Influenza Vaccine/High Dose COVID-19 Vaccine and Placebo
Arm M/MMEXPERIMENTALHigh Dose Investigational Influenza Vaccine/Medium Dose COVID-19 Vaccine and Placebo

Interventions

NameTypeDescription
Investigational Influenza VaccineBIOLOGICALInvestigational Influenza Vaccine
Investigational COVID-19 VaccineBIOLOGICALInvestigational COVID-19 Vaccine
Investigational Influenza and COVID-19 Combination VaccineCOMBINATION_PRODUCTInvestigational Combined Influenza and COVID-19 Vaccine
Licensed Influenza Vaccine 1BIOLOGICALLicensed Influenza Vaccine 1
Licensed Influenza Vaccine 2BIOLOGICALLicensed Influenza Vaccine 2
Licensed Influenza Vaccine 3BIOLOGICALLicensed Influenza Vaccine 3
Licensed COVID-19 VaccineBIOLOGICALPfizer-BioNTech COVID-19 Vaccine
COVID-19 VaccineBIOLOGICALPfizer-BioNTech COVID-19 Vaccine
Investigational Influenza/COVID-19 VaccineCOMBINATION_PRODUCTCombined investigational influenza and Pfizer-BioNTech COVID-19 Vaccine
PlaceboOTHERSaline
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersYes
Study Sites31

Inclusion criteria: * Participants 18 years of age or older * Healthy participants who are determined by medical history, physical examination (if clinically required), and clinical judgement of the investigator to be eligible for inclusion in the study Exclusion criteria: * Vaccination with any ...

Countries:United States
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Frequently asked questions about Investigational Influenza Vaccine

What is the Investigational Influenza Vaccine?

The Investigational Influenza Vaccine is a Phase 1 investigational vaccine being developed by BioNTech SE (BNTX) for influenza in humans. It is being studied in healthy adults aged 18 years and older in the United States. The vaccine is not yet approved and remains in clinical development.

What does the Investigational Influenza Vaccine target?

The Investigational Influenza Vaccine targets influenza viruses. It is being studied for its ability to generate immune responses against flu, as well as COVID-19 when given alongside COVID-19 vaccines. The exact molecular target has not been specified in available information.

Who makes the Investigational Influenza Vaccine?

The Investigational Influenza Vaccine is being developed by BioNTech SE, a biotechnology company traded on the NASDAQ under the ticker BNTX. BioNTech is conducting Phase 1 clinical trials of the vaccine in the United States.

What phase is the Investigational Influenza Vaccine in?

The Investigational Influenza Vaccine is in Phase 1 clinical development. It is an investigational product and has not been approved by regulatory authorities. Two Phase 1 trials have been completed, with a total enrollment of 2,650 healthy participants.

What clinical trials is the Investigational Influenza Vaccine in?

The Investigational Influenza Vaccine has been studied in two completed Phase 1 trials: NCT06683352, which enrolled 1,353 healthy adults, and NCT06821061, which enrolled 2,650 healthy adults. Both trials were conducted in the United States and evaluated flu and COVID-19 vaccine responses in healthy people aged 18 and older.

Is the Investigational Influenza Vaccine the same as a COVID-19 vaccine?

The Investigational Influenza Vaccine is not the same as a COVID-19 vaccine. It is designed to target influenza, but clinical trials are evaluating it alongside COVID-19 vaccines to study immune responses to both flu and COVID-19 in healthy adults.