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A Phase 3/3b, Randomized, Observer-blind, Multicenter Clinical Study to Evaluate the Efficacy, Safety and Immunogenicity of Fluad and Fluad Quadrivalent Compared to a Non-adjuvanted Influenza Vaccine in Adults ≥65 Years of Age

Status
Recruiting
Phases
Phase 3
Study type
Interventional
Source
EU CTIS
Registry ID
CTIS2022-503004-24-00
Acronym
V118_24
Enrollment
27200
Registered
2023-09-05
Start date
2023-10-20
Completion date
Unknown
Last updated
2025-12-10

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Influenza virus

Brief summary

First-occurrence of RT-PCR-confirmed influenza, due to any influenza Type A and/or B virus (regardless of antigenic match), occurring from 14 days after vaccination (ie study day 15) and until the end of influenza season, using the protocol-defined ILI definition.

Detailed description

First-occurrence of culture-confirmed influenza, due to influenza Type A and/or B virus antigenically matched to the vaccine strains selected for the seasonal vaccine, occurring from 14 days after vaccination (ie study day 15) and until the end of influenza season, using the protocol-defined ILI definition., First-occurrence of culture-confirmed influenza, due to any influenza Type A and/or B virus (regardless of antigenic match), occurring from 14 days after vaccination and until the end of influenza season, using the protocol-defined ILI definition., First-occurrence of RT-PCR-confirmed influenza, due to any influenza Type A and/or B virus (regardless of antigenic match), occurring from 14 days after vaccination (ie study day 15) and until the end of influenza season, using the modified CDC ILI definition as well as the WHO ILI definition., First-occurrence of culture-confirmed influenza, due to influenza Type A and/or B virus antigenically unmatched to the vaccine strains selected for the seasonal vaccine, occurring from 14 days after vaccination (ie study day 15) and until the end of influenza season, using the protocol-defined ILI definition, The measures for immunogenicity as determined by the serum HI antibody titers for Day 1 and Day 22 for four vaccine homologous influenza strains are as follows for the subjects selected for the immunogenicity subset in each season – reference is made to the study protocol, page 79., Safety of the study vaccines will be assessed in all subjects in terms of the frequency of reported AEs including: • All AEs reported within 30 minutes after vaccination; • SAEs reported during the entire study period; • AESIs reported during the entire study period; • AEs leading to premature withdrawal from the study during the entire study period.

Interventions

DRUGFLUARIX (Influenza Vaccine)
DRUGFluad suspension for injection in pre-filled syringe Influenza vaccine (surface antigen
DRUGadjuvanted)
DRUGFluarix Tetra suspensión inyectable en jeringa precargada Vacuna antigripal (de virus fraccionados e inactivados)

Sponsors

Seqirus UK Limited
Lead SponsorINDUSTRY

Eligibility

Sex/Gender
All
Age
65 Years to No maximum

Design outcomes

Primary

MeasureTime frame
First-occurrence of RT-PCR-confirmed influenza, due to any influenza Type A and/or B virus (regardless of antigenic match), occurring from 14 days after vaccination (ie study day 15) and until the end of influenza season, using the protocol-defined ILI definition.

Secondary

MeasureTime frame
First-occurrence of culture-confirmed influenza, due to influenza Type A and/or B virus antigenically matched to the vaccine strains selected for the seasonal vaccine, occurring from 14 days after vaccination (ie study day 15) and until the end of influenza season, using the protocol-defined ILI definition., First-occurrence of culture-confirmed influenza, due to any influenza Type A and/or B virus (regardless of antigenic match), occurring from 14 days after vaccination and until the end of influenza season, using the protocol-defined ILI definition., First-occurrence of RT-PCR-confirmed influenza, due to any influenza Type A and/or B virus (regardless of antigenic match), occurring from 14 days after vaccination (ie study day 15) and until the end of influenza season, using the modified CDC ILI definition as well as the WHO ILI definition., First-occurrence of culture-confirmed influenza, due to influenza Type A and/or B virus antigenically unmatched to the vaccine strains selected f

Countries

Belgium, Bulgaria, Czechia, Finland, Italy, Lithuania, Netherlands, Poland, Romania, Spain

Outcome results

None listed

Source: EU CTIS · Data processed: Feb 4, 2026