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Trivalent-Darwin influenza vaccine

Phase 1

Influenza | Monoclonal antibody | Infectious Disease |Sanofi|Last Updated: Sep 11, 2025

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_CONTROLLEDBiomarker
Total Trials1
Total Enrollment400
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT06507553Study of Influenza Vaccines Containing an Additional H3 Antigen in Healthy Adult Participants 18 to 49 Years of Age and 60 Years of Age and OlderPHASE1 COMPLETED 400Aug 12, 2024Mar 4, 2025Sep 11, 202510 Australia
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Study Endpoints
Primary Endpoints
Number of participants with immediate adverse event
Within 30 minutes after vaccination

Includes unsolicited systemic adverse events (or) medically relevant unsolicited systemic adverse events, including those related to the product administered

Number of participants with solicited injection site reactions
Within 7 days after vaccination

Adverse reactions prelisted in the participant diary

Number of participants with solicited systemic reactions
Within 7 days after vaccination

Adverse reactions prelisted in the participant diary

Number of participants with unsolicited adverse events
Throughout the study, approximately 3 weeks

Adverse events other than solicited reactions

Number of participants with serious adverse events
Throughout the study, approximately 3 weeks

SAEs occurring throughout the study

Number of participants with adverse events of special interest (AESIs)
Throughout the study, approximately 3 weeks

AESIs occurring throughout the study

Secondary Endpoints
Seroconversion based on hemagglutination inhibition antibody titer
Day 1 and day 22
Seroprotection based on hemagglutination inhibition antibody titer
Day 1 and day 22
Obtained hemagglutination inhibition antibody titers
Day 1 and day 22
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Study Design & Arms
AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposePREVENTION
Treatment Arms
ArmTypeDescription
Group 1 (Stage 1)ACTIVE_COMPARATORTrivalent-Darwin standard dose (SD) formulation will be administered in a single injection to participants aged 18 to 49 years old
Group 2 (Stage 1)EXPERIMENTALAugment-Tasmania SD formulation will be administered in a single injection to participants aged 18 to 49 years old
Group 3 (Stage 1)EXPERIMENTALTIV-2X Darwin SD formulation will be administered in a single injection to participants aged 18 to 49 years old
Group 4 (Stage 1)EXPERIMENTALTrivalent-Tasmania SD formulation will be administered in a single injection to participants aged 18 to 49 years old
Group 5 (Stage 2)ACTIVE_COMPARATORTrivalent-Darwin high dose (HD) formulation will be administered in a single injection to participants of 60 years and older
Group 6 (Stage 2)EXPERIMENTALAugment-Tasmania HD formulation will be administered in a single injection to participants of 60 years and older
Group 7 (Stage 2)EXPERIMENTALTIV-2X Darwin HD formulation will be administered in a single injection to participants of 60 years and older
Group 8 (Stage 2)EXPERIMENTALTrivalent-Tasmania HD formulation will be administered in a single injection to participants of 60 years and older
Interventions
NameTypeDescription
Trivalent-Darwin influenza vaccineBIOLOGICALPharmaceutical form:Suspension for injection-Route of administration:Intramuscular
Augment-Tasmania influenza vaccineBIOLOGICALPharmaceutical form:Suspension for injection-Route of administration:Intramuscular
TIV-2X Darwin influenza vaccineBIOLOGICALPharmaceutical form:Suspension for injection-Route of administration:Intramuscular
Trivalent-Tasmania influenza vaccineBIOLOGICALPharmaceutical form:Suspension for injection-Route of administration:Intramuscular
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Eligibility Criteria
Age Range18 Years — N/A
SexALL
Healthy VolunteersYes
Study Sites10

Inclusion Criteria: * Aged 18 to 49 years (Stage 1) or 60 years of age and older (Stage 2) on the day of inclusion * Participants who are healthy as determined by medical evaluation including medical history and physical examination, if deemed necessary * A female participant is eligible to partici...

Countries:Australia
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