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Standard-Dose influenza virus surface antigens, Inactivated, Influenza Vaccine Quadrivalent, 2019-2020 Northern Hemisphere Strains

Phase 3

Influenza Immunization | Vaccine | Infectious Disease |Sanofi|Last Updated: Sep 12, 2025

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindACTIVE_CONTROLLED
Total Trials1
Total Enrollment1,539

FDA Designations

No designations recorded

Clinical trial landscape

Standard-Dose influenza virus surface antigens, Inactivated, Influenza Vaccine Quadrivalent, 2019-2020 Northern Hemisphere Strains · 1 trial · 2 indications

Phase 3 1
NCT04024228Study to Assess the Immune Response and the Safety Profile of a High-Dose Quadrivalent Influenza Vaccine (QIV-HD) Compared to a Standard-Dose Quadrivalent Influenza Vaccine (QIV-SD) in Europeans Adults 60 Years of Age and OlderInfluenza Immunization
COMPLETED1,539 Analytics
PHASE3COMPLETED
Study to Assess the Immune Response and the Safety Profile of a High-Dose Quadrivalent Influenza Vaccine (QIV-HD) Compared to a Standard-Dose Quadrivalent Influenza Vaccine (QIV-SD) in Europeans Adults 60 Years of Age and Older
Influenza ImmunizationUnlock trial analytics

Study Endpoints

Primary Endpoints

Geometric Mean Titers (GMTs) of Influenza Antibodies in Participants Aged 60-64 Years and Greater Than or Equal to (>=) 65 Years
Day 28 post-vaccination

GMTs of anti-influenza antibodies were measured using hemagglutination inhibition (HAI) assay for 4 influenza virus strains: A/H1N1, A/H3N2, B1 (B Victoria lineage), and B2 (B Yamagata lineage).Titers were expressed in terms of 1/dilution.

Secondary Endpoints

Geometric Mean Titers of Influenza Antibodies Pre-and Post-Vaccination in All Age Group Participants
Day 0 (pre-vaccination), Day 28 (post-vaccination)
Geometric Mean Titers of Influenza Antibodies Pre- and Post-Vaccination in Participants Aged 60-64 Years and >=65 Years
Day 0 (pre-vaccination), Day 28 (post-vaccination)
Geometric Mean Titer Ratios (GMTRs) of Influenza Antibodies in All Age Group Participants
Day 0 (pre-vaccination), Day 28 (post-vaccination)
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposePREVENTION

Treatment Arms

ArmTypeDescription
Group 1: QIV-HDEXPERIMENTALParticipants received a single injection of 0.7 milliliters (mL) QIV-HD, intramuscularly (IM) at Day 0.
Group 2: QIV-SDACTIVE_COMPARATORParticipants received a single injection of 0.5 mL QIV-SD, IM at Day 0.

Interventions

NameTypeDescription
Standard-Dose influenza virus surface antigens (haemagglutinin and neuraminidase), Inactivated, Influenza Vaccine Quadrivalent, 2019-2020 Northern Hemisphere Strains (QIV-SD)BIOLOGICALPharmaceutical form: Suspension for injection in pre-filled syringe Route of administration: IM
High-Dose Influenza Vaccine (split virion, inactivated), Quadrivalent (QIV-HD) 2019-2020 Northern Hemisphere formulationBIOLOGICALPharmaceutical form: Suspension for injection in pre-filled syringe Route of administration: IM
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Eligibility Criteria

Age Range60 Years to N/A
SexALL
Healthy VolunteersYes
Study Sites17

Inclusion criteria : * Sixty years of age and older on the day of inclusion. * Able to attend all scheduled visits and complied with all trial procedures. Exclusion criteria: * Participant was pregnant, or lactating, or of childbearing potential and did not used an effective method of contracepti...

Countries:BelgiumFranceGermanyItalyNetherlandsPoland
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Frequently asked questions about Standard-Dose influenza virus surface antigens, Inactivated, Influenza Vaccine Quadrivalent, 2019-2020 Northern Hemisphere Strains

What is Standard-Dose influenza virus surface antigens, Inactivated, Influenza Vaccine Quadrivalent, 2019-2020 Northern Hemisphere Strains?

It is an inactivated quadrivalent influenza vaccine containing surface antigens (haemagglutinin and neuraminidase) from the 2019-2020 Northern Hemisphere influenza strains. It is designed for influenza immunization and is given as a standard dose. Sanofi developed it, and it was studied in adults 60 years of age and older.

What is Standard-Dose influenza virus surface antigens, Inactivated, Influenza Vaccine Quadrivalent, 2019-2020 Northern Hemisphere Strains used for?

It is used for influenza immunization, specifically to protect against the influenza strains selected for the 2019-2020 Northern Hemisphere season. The clinical study enrolled healthy volunteers aged 60 years and older in six European countries, a population at higher risk of influenza complications.

Who makes Standard-Dose influenza virus surface antigens, Inactivated, Influenza Vaccine Quadrivalent, 2019-2020 Northern Hemisphere Strains?

Sanofi develops this quadrivalent influenza vaccine. Sanofi trades on the New York Stock Exchange under the ticker SNY. The vaccine was evaluated in a Phase 3 study comparing it with a high-dose quadrivalent influenza vaccine in older adults.

What phase is Standard-Dose influenza virus surface antigens, Inactivated, Influenza Vaccine Quadrivalent, 2019-2020 Northern Hemisphere Strains in?

It has been studied in Phase 3 clinical development. The single registered trial, NCT04024228, is completed, and no trials for this specific 2019-2020 Northern Hemisphere formulation are currently active. It is an investigational product evaluated in clinical research rather than a newly approved vaccine.

What clinical trials is Standard-Dose influenza virus surface antigens, Inactivated, Influenza Vaccine Quadrivalent, 2019-2020 Northern Hemisphere Strains in?

It was evaluated in the Phase 3 trial NCT04024228, titled a study to assess the immune response and safety profile of a high-dose quadrivalent influenza vaccine compared to a standard-dose quadrivalent influenza vaccine in European adults 60 years of age and older. The trial was randomized, double-blind, active-controlled, and enrolled 1,539 participants across Belgium, France, Germany, Italy, Netherlands, and Poland.

Is Standard-Dose influenza virus surface antigens, Inactivated, Influenza Vaccine Quadrivalent, 2019-2020 Northern Hemisphere Strains the same as QIV-SD?

Yes. QIV-SD is the abbreviated name for Standard-Dose influenza virus surface antigens (haemagglutinin and neuraminidase), Inactivated, Influenza Vaccine Quadrivalent, 2019-2020 Northern Hemisphere Strains. QIV-SD stands for quadrivalent influenza vaccine, standard dose, and refers to the same inactivated vaccine product.