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Study to Assess Safety and Immunogenicity of an Egg-based H5N8 Influenza Vaccine at Multiple Dose Levels Adjuvanted With Matrix-M in Healthy Participants 18 Years of Age and Above.

11. September 2026 aktualisiert von: Sanofi

A Phase 1/2, Parallel, Observer-blind Study to Assess the Safety and Immunogenicity of an Egg-based H5N8 Influenza Vaccine at Multiple Dose Levels Adjuvanted With Matrix-M in Healthy Participants 18 Years of Age and Above.

The study aims to evaluate an egg-based H5N8 influenza vaccine up to 3 dose levels (low, medium, and high dose) given with or without adjuvant to see if the adjuvant improves vaccine effectiveness.

The study will enroll healthy adults aged 18 years and over. Participants will receive 2 injections in their arm of either one of the 3 dose levels of the study vaccine (low, medium, or high dose) with the adjuvant or the unadjuvanted vaccine (high dose).

Study duration per participant: approximately 14 months (including screening visit).

Studienübersicht

Status

Rekrutierung

Bedingungen

Intervention / Behandlung

Studientyp

Interventionell

Einschreibung (Geschätzt)

640

Phase

  • Phase 2
  • Phase 1

Kontakte und Standorte

Dieser Abschnitt enthält die Kontaktdaten derjenigen, die die Studie durchführen, und Informationen darüber, wo diese Studie durchgeführt wird.

Studienkontakt

  • Name: Trial Transparency email recommended (Toll free for US & Canada)
  • Telefonnummer: option 6 800-633-1610
  • E-Mail: contact-us@sanofi.com

Studienorte

    • Arizona
      • Tempe, Arizona, Vereinigte Staaten, 85281
        • Rekrutierung
        • AMR Clinical Phoenix, Arizona- Site Number : 8400004
    • California
      • Rolling Hills Estates, California, Vereinigte Staaten, 90274
        • Rekrutierung
        • Peninsula Research Associates- Site Number : 8400011
      • San Diego, California, Vereinigte Staaten, 92123
        • Rekrutierung
        • California Research Foundation- Site Number : 8400007
    • Florida
      • Coral Gables, Florida, Vereinigte Staaten, 33134
        • Rekrutierung
        • Alliance for Multispeciality Research - Coral Gables- Site Number : 8400003
      • DeLand, Florida, Vereinigte Staaten, 32720
        • Rekrutierung
        • Accel Research Sites Network - DeLand Clinical Research Unit- Site Number : 8400017
      • Fort Myers, Florida, Vereinigte Staaten, 33912
        • Rekrutierung
        • Alliance for Multispeciality Research - Fort Myers- Site Number : 8400001
      • Miami Lakes, Florida, Vereinigte Staaten, 33016
        • Rekrutierung
        • Indago Research & Health Center- Site Number : 8400010
    • Georgia
      • Decatur, Georgia, Vereinigte Staaten, 30030
        • Rekrutierung
        • Accel Research Sites - NeuroStudies- Site Number : 8400014
      • Decatur, Georgia, Vereinigte Staaten, 30030
        • Rekrutierung
        • iResearch Atlanta- Site Number : 8400008
    • Illinois
      • Oak Brook, Illinois, Vereinigte Staaten, 60523
        • Rekrutierung
        • AMR Chicago- Site Number : 8400005
    • Kansas
      • Newton, Kansas, Vereinigte Staaten, 67114
        • Rekrutierung
        • AMR Clinical Newton, Kansas- Site Number : 8400006
    • New York
      • Rochester, New York, Vereinigte Staaten, 14609
        • Rekrutierung
        • Rochester Clinical Research- Site Number : 8400012
    • South Carolina
      • North Charleston, South Carolina, Vereinigte Staaten, 29405
        • Rekrutierung
        • Coastal Carolina Research Center - North Charleston- Site Number : 8400018
    • Tennessee
      • Knoxville, Tennessee, Vereinigte Staaten, 37909
        • Rekrutierung
        • Alliance for Multispecialty Research - Weisgarber Medical Park- Site Number : 8400002
    • Utah
      • Salt Lake City, Utah, Vereinigte Staaten, 84107
        • Rekrutierung
        • CenExel JRB - Salth Lake City- Site Number : 8400009
    • Virginia
      • Charlottesville, Virginia, Vereinigte Staaten, 22911
        • Rekrutierung
        • Charlottesville Medical Research- Site Number : 8400016

Teilnahmekriterien

Forscher suchen nach Personen, die einer bestimmten Beschreibung entsprechen, die als Auswahlkriterien bezeichnet werden. Einige Beispiele für diese Kriterien sind der allgemeine Gesundheitszustand einer Person oder frühere Behandlungen.

Zulassungskriterien

Studienberechtigtes Alter

  • Erwachsene
  • Älterer Erwachsener

Akzeptiert gesunde Freiwillige

Ja

Beschreibung

Inclusion Criteria:

  • Aged 18 years or above on the day of inclusion
  • Participants who are healthy as determined by medical evaluation including medical history
  • Not pregnant/breastfeeding; non-childbearing potential or uses effective contraception/abstinence from ≥4 weeks before the first study intervention dose to ≥8 weeks after the last dose
  • Informed consent form has been signed and dated
  • Able to attend all scheduled visits and to comply with all study procedures
  • Covered by health insurance, if required by local regulations

Exclusion Criteria:

  • Known or suspected immunodeficiency; immunosuppressive therapy in past 6 months; or long-term systemic corticosteroid (eg, prednisone for more than 2 weeks in the past 3 months)
  • Known hepatitis B or hepatitis C infection (based on medical history)
  • Known personal or family history of previous episodes of Guillan-Barré syndrome (GBS), neuritis (including Bell's palsy), convulsions, encephalitis, transverse myelitis, and vasculitis
  • Known systemic hypersensitivity to any of the study intervention components or history of life-threatening reaction to the study interventions or products with same substances
  • Self-reported thrombocytopenia contraindicating intramuscular (IM) injection based on investigator's judgment
  • Bleeding disorder, or receipt of anticoagulants in the 3 weeks preceding inclusion, contraindicating IM injection based on investigator's judgment
  • Chronic illness that, in the opinion of the investigator, is at a stage where it might interfere with study conduct or completion
  • History of A/H5 infection prior to the study participation
  • Moderate or severe acute illness/infection (per investigator judgment)/fever (≥ 38.0°C [≥ 100.4°F]) on study intervention day. Include participant only after the condition or fever has resolved
  • Alcohol, prescription drug, or substance abuse that, in the opinion of the investigator, might interfere with the study conduct or completion
  • Any vaccine given 4 weeks before first study intervention or any planned vaccination to be given prior to Day 43 (ie, approximately 21 days after the second study intervention)
  • Previous vaccination against A(H5) with an investigational or marketed vaccine. This includes, but is not limited to, influenza subtypes A(H5N1), A(H5N8), and A(H5N6)
  • Has received a blood transfusion or blood-derived products, including immunoglobulins in the past 3 months
  • Participation in another clinical study for a vaccine, drug, medical device, or medical procedure within 4 weeks before enrollment or planned participation during the present study period
  • Deprived of freedom by an administrative or court order, or in an emergency setting, or hospitalized involuntarily
  • Is an investigator, investigator/study center employee, or immediate family member (parent, spouse, natural/adopted child) of the investigator/employee with direct involvement in the study
  • Any screening safety laboratory parameters out of normal ranges and assessed as > Grade 2

The above information is not intended to contain all considerations relevant to a participant's potential participation in a clinical trial.

Studienplan

Dieser Abschnitt enthält Einzelheiten zum Studienplan, einschließlich des Studiendesigns und der Messung der Studieninhalte.

Wie ist die Studie aufgebaut?

Designdetails

  • Hauptzweck: Verhütung
  • Zuteilung: Zufällig
  • Interventionsmodell: Parallele Zuordnung
  • Maskierung: Doppelt

Waffen und Interventionen

Teilnehmergruppe / Arm
Intervention / Behandlung
Experimental: Group 1: Flu H5 egg pandemic low dose vaccine, with adjuvant
Participants receive 2 intramuscular injections of flu H5 egg pandemic low dose vaccine, with adjuvant
Pharmaceutical form: Suspension for injection Route of administration: Intramuscular (IM)
Experimental: Group 2: Flu H5 Egg Pandemic medium dose vaccine, with adjuvant
Participants receive 2 intramuscular injections of flu H5 egg pandemic medium dose vaccine, with adjuvant
Pharmaceutical form: Suspension for injection Route of administration: Intramuscular (IM)
Experimental: Group 3: Flu H5 Egg Pandemic high dose vaccine, with adjuvant
Participants receive 2 intramuscular injections of flu H5 egg pandemic high dose vaccine, with adjuvant
Pharmaceutical form: Suspension for injection Route of administration: Intramuscular (IM)
Experimental: Group 4: Flu H5 Egg Pandemic high dose vaccine, without adjuvant
Participants receive 2 intramuscular injections of flu H5 egg pandemic high dose vaccine, without adjuvant
Pharmaceutical form: Suspension for injection Route of administration: Intramuscular (IM)

Was misst die Studie?

Primäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Number of participants with immediate Adverse Events (AEs)
Zeitfenster: Within 30 minutes after each vaccination
Immediate adverse events are medically relevant unsolicited systemic adverse events reported in the 30 minutes after vaccination
Within 30 minutes after each vaccination
Number of participants experiencing solicited administration site reactions (pre-listed in the participant diary and case report form [CRF])
Zeitfenster: Within 8 days of each vaccination, including the day of vaccination
A solicited reaction is an adverse reaction (sign or symptom) observed and reported under the conditions pre-listed (for example: injection site pain or headache). Solicited administration site reactions are reactions at and around the injection/administration site
Within 8 days of each vaccination, including the day of vaccination
Number of participants experiencing solicited systemic reactions (pre-listed in the participant diary and CRF)
Zeitfenster: Within 8 days of each vaccination, including the day of vaccination
All solicited reactions that are not solicited injection or administration site reactions
Within 8 days of each vaccination, including the day of vaccination
Number of participants experiencing unsolicited AEs
Zeitfenster: Within 21 days after the first vaccination, including the day of the first vaccination, and within 28 days after the second vaccination, including the day of the second vaccination
Unsolicited AE: an observed AE that does not fulfill the conditions of solicited reactions
Within 21 days after the first vaccination, including the day of the first vaccination, and within 28 days after the second vaccination, including the day of the second vaccination
Number of participants experiencing Medically Attended Adverse Events (MAAEs)
Zeitfenster: From Day 01 until the end of the study, approximately 14 months
MAAEs are collected throughout the study
From Day 01 until the end of the study, approximately 14 months
Number of participants experiencing Adverse Events of Special Interest (AESIs)
Zeitfenster: From Day 01 until the end of the study, approximately 14 months
AESIs are collected throughout the study
From Day 01 until the end of the study, approximately 14 months
Number of participants experiencing Serious Adverse Events (SAEs)
Zeitfenster: From Day 01 until the end of the study, approximately 14 months
SAEs are collected throughout the study
From Day 01 until the end of the study, approximately 14 months
Number of participants experiencing out-of-range biological test results (including shift from baseline values)
Zeitfenster: Up to 8 days after each vaccination
Safety laboratory assessments will include clinical chemistry and hematology
Up to 8 days after each vaccination
Number of participants experiencing AEs leading to discontinuation
Zeitfenster: From Day 01 until the end of the study, approximately 14 months
AEs leading to discontinuation are collected throughout the study
From Day 01 until the end of the study, approximately 14 months
Geometric mean titer of hemagglutination inhibition (HAI) assay antibody (Ab) titer
Zeitfenster: Day 01 and Day 43
Influenza vaccine antibody titers are measured by HAI assay
Day 01 and Day 43
Number of participants with HAI Ab titer ≥ 40 (1 dilution [dil]; ie, seroprotection)
Zeitfenster: Day 43
Influenza vaccine antibody titers are measured by HAI assay
Day 43
Number of participants with seroconversion
Zeitfenster: Day 01 and Day 43
Seroconversion is defined as HAI Ab titer < 10 (1/dil) on Day 01 and post-injection titer ≥ 40 (1/dil) on Day 43; or defined as HAI Ab titer ≥ 10 (1/dil) on Day 01 and a ≥ 4-fold increase in titer (1/dil) on Day 43
Day 01 and Day 43
Geometric mean titer ratio of individual HAI Ab titer ratio Day 43/Day 01
Zeitfenster: Day 01 and Day 43
Influenza vaccine antibody titers are measured by HAI assay
Day 01 and Day 43

Sekundäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Geometric mean titer of hemagglutination inhibition (HAI) assay antibody (Ab) titer obtained on Day 01, Day 22, Day 43, Day 202
Zeitfenster: Day 01, Day 22, Day 43, Day 202
Influenza vaccine antibody titers are measured by HAI assay
Day 01, Day 22, Day 43, Day 202
Geometric mean titer ratio of individual HAI Ab titer ratios Day 22/Day 01, Day 43/Day 01, Day 202/Day 43
Zeitfenster: Day 01, Day 22, Day 43, Day 202
Individual HAI Ab titer ratios are calculated for the following time points: Day 22/Day 01, Day 43/Day 01 and Day 202/Day 43
Day 01, Day 22, Day 43, Day 202
Number of participants with individual HAI Ab titer ≥ 40 (1/dil) on Day 01, Day 22, Day 43, Day 202
Zeitfenster: Day 01, Day 22, Day 43, Day 202
Influenza vaccine antibody titers are measured by HAI assay
Day 01, Day 22, Day 43, Day 202
Number of participants with seroconversion on Day 22 compared to Day 01 (baseline)
Zeitfenster: Day 01, Day 22
Seroconversion is defined as titer < 10 (1/dil) on Day 01 and post-injection titer ≥ 40 (1/dil) on Day 22; or defined as titer ≥ 10 (1/dil) on Day 01 and a ≥ 4 fold increase in titer (1/dil) on Day 22
Day 01, Day 22
Number of participants with detectable HAI Ab titer
Zeitfenster: Day 01, Day 22, Day 43, Day 202
Detectable HAI Ab titer: a titer ≥ 10 (1/dil)
Day 01, Day 22, Day 43, Day 202
Geometric mean titer of neutralization (NT) Ab titer
Zeitfenster: Day 01, Day 22, Day 43, Day 202
Influenza vaccine antibody titers are measured by serum neutralization (SN) assay
Day 01, Day 22, Day 43, Day 202
Geometric mean titer ratio of individual NT Ab titer ratio
Zeitfenster: Day 01, Day 22, Day 43, Day 202
Individual NT Ab titer ratios are calculated for the following time points: Day 22/Day 01, Day 43/Day 01 and Day 202/Day 43
Day 01, Day 22, Day 43, Day 202
Number of participants with NT Ab titer ≥ 20 (1/dil)
Zeitfenster: Day 01, Day 43, Day 202
NT Ab titer ≥ 20 (1/dil) on Day 43; compared to Day 01 and Day 202
Day 01, Day 43, Day 202
Number of participants with NT Ab titer ≥ 40 (1/dil)
Zeitfenster: Day 01, Day 43, Day 202
NT Ab titer ≥ 40 (1/dil) on Day 43; compared to Day 01 and Day 202
Day 01, Day 43, Day 202
Number of participants with NT Ab titer ≥ 80 (1/dil)
Zeitfenster: Day 01, Day 43, Day 202
NT Ab titer ≥ 80 (1/dil) on Day 43; compared to Day 01 and Day 202
Day 01, Day 43, Day 202
Geometric mean fold-rise of fold increase in NT Ab titer [post/pre] ≥ 2 and ≥ 4
Zeitfenster: Day 43
Influenza vaccine antibody titers are measured by serum neutralization (SN) assay
Day 43
Number of participants with detectable NT Ab titer
Zeitfenster: Day 01, Day 22, Day 43, Day 202
Detectable NT Ab titer: a titer ≥ 10 (1/dil) on Day 01, Day 22, Day 43, Day 202
Day 01, Day 22, Day 43, Day 202

Mitarbeiter und Ermittler

Hier finden Sie Personen und Organisationen, die an dieser Studie beteiligt sind.

Sponsor

Studienaufzeichnungsdaten

Diese Daten verfolgen den Fortschritt der Übermittlung von Studienaufzeichnungen und zusammenfassenden Ergebnissen an ClinicalTrials.gov. Studienaufzeichnungen und gemeldete Ergebnisse werden von der National Library of Medicine (NLM) überprüft, um sicherzustellen, dass sie bestimmten Qualitätskontrollstandards entsprechen, bevor sie auf der öffentlichen Website veröffentlicht werden.

Haupttermine studieren

Studienbeginn (Tatsächlich)

3. August 2026

Primärer Abschluss (Geschätzt)

22. Februar 2028

Studienabschluss (Geschätzt)

22. Februar 2028

Studienanmeldedaten

Zuerst eingereicht

31. Juli 2026

Zuerst eingereicht, das die QC-Kriterien erfüllt hat

19. August 2026

Zuerst gepostet (Tatsächlich)

21. August 2026

Studienaufzeichnungsaktualisierungen

Letztes Update gepostet (Tatsächlich)

15. September 2026

Letztes eingereichtes Update, das die QC-Kriterien erfüllt

11. September 2026

Zuletzt verifiziert

1. September 2026

Mehr Informationen

Begriffe im Zusammenhang mit dieser Studie

Andere Studien-ID-Nummern

  • VBX21138
  • U1111-1325-2670 (Registrierungskennung: ICTRP)

Plan für individuelle Teilnehmerdaten (IPD)

Planen Sie, individuelle Teilnehmerdaten (IPD) zu teilen?

JA

Beschreibung des IPD-Plans

Qualified researchers may request access to patient level data and related study documents including the clinical study report, study protocol with any amendments, blank case report form, statistical analysis plan, and dataset specifications. Patient level data will be anonymized and study documents will be redacted to protect the privacy of trial participants. Further details on Sanofi's data sharing criteria, eligible studies, and process for requesting access can be found at: https://vivli.org

Arzneimittel- und Geräteinformationen, Studienunterlagen

Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt

Ja

Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt

Nein

Diese Informationen wurden ohne Änderungen direkt von der Website clinicaltrials.gov abgerufen. Wenn Sie Ihre Studiendaten ändern, entfernen oder aktualisieren möchten, wenden Sie sich bitte an register@clinicaltrials.gov. Sobald eine Änderung auf clinicaltrials.gov implementiert wird, wird diese automatisch auch auf unserer Website aktualisiert .