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Study identifier: NCT05501561 Synced from ClinicalTrials.gov · August 04, 2026
● Completed

Safety and Immunogenicity of Different Formulations of an MF59-Adjuvanted Influenza Vaccine in Older Adults ≥50 Years of Age

Condition: Influenza, Human  ·  Sponsor: Seqirus

PhasePhase 2
Planned participants1056
Who can joinAll sexes, 50 Years to no upper limit
Healthy volunteersYes

About this study

This Phase 2, randomized, observer-blind, dose-confirmation clinical study evaluated different formulations of MF59-Adjuvanted Quadrivalent Subunit Inactivated Influenza Vaccine. Approximately 1000 subjects were randomized into 1 of 4 possible treatment groups with approximately 250 participants per group. Every participant received an influenza vaccine injection on Day 1 and were to be followed up for approximately 6 months following injection. The primary immunogenicity analysis is based on Day 29 serology data.

This description comes directly from the study's public registry record.

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No contact information is available for this study as per the public registry record.

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Locations (47)

AMR TempeTempe, Arizona, United States
Marvel Clinical ResearchHuntington Beach, California, United States
California Research CenterSan Diego, California, United States
The Lynn Institute of The RockiesColorado Springs, Colorado, United States
Clinical Research Consulting, LLCMilford, Connecticut, United States
Innovative Research of West Florida, Inc.Clearwater, Florida, United States
Velocity Clinical Research - New Smyrna BeachEdgewater, Florida, United States
CenExel RCAHollywood, Florida, United States
Health Awareness INCJupiter, Florida, United States
Global Health Research CenterMiami Lakes, Florida, United States
Precision Clinical ResearchSunrise, Florida, United States
Global Health Research CenterTampa, Florida, United States

+ 35 more locations — full list on the registry record.

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