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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. září 2026 aktualizováno: 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).

Přehled studie

Postavení

Nábor

Podmínky

Intervence / Léčba

Typ studie

Intervenční

Zápis (Odhadovaný)

640

Fáze

  • Fáze 2
  • Fáze 1

Kontakty a umístění

Tato část poskytuje kontaktní údaje pro ty, kteří studii provádějí, a informace o tom, kde se tato studie provádí.

Studijní kontakt

  • Jméno: Trial Transparency email recommended (Toll free for US & Canada)
  • Telefonní číslo: option 6 800-633-1610
  • E-mail: contact-us@sanofi.com

Studijní místa

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

Kritéria účasti

Výzkumníci hledají lidi, kteří odpovídají určitému popisu, kterému se říká kritéria způsobilosti. Některé příklady těchto kritérií jsou celkový zdravotní stav osoby nebo předchozí léčba.

Kritéria způsobilosti

Věk způsobilý ke studiu

  • Dospělý
  • Starší dospělý

Přijímá zdravé dobrovolníky

Ano

Popis

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.

Studijní plán

Tato část poskytuje podrobnosti o studijním plánu, včetně toho, jak je studie navržena a co studie měří.

Jak je studie koncipována?

Detaily designu

  • Primární účel: Prevence
  • Přidělení: Randomizované
  • Intervenční model: Paralelní přiřazení
  • Maskování: Dvojnásobek

Zbraně a zásahy

Skupina účastníků / Arm
Intervence / Léčba
Experimentální: 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)
Experimentální: 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)
Experimentální: 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)
Experimentální: 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)

Co je měření studie?

Primární výstupní opatření

Měření výsledku
Popis opatření
Časové okno
Number of participants with immediate Adverse Events (AEs)
Časové okno: 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])
Časové okno: 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)
Časové okno: 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
Časové okno: 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)
Časové okno: 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)
Časové okno: 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)
Časové okno: 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)
Časové okno: 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
Časové okno: 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
Časové okno: 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)
Časové okno: Day 43
Influenza vaccine antibody titers are measured by HAI assay
Day 43
Number of participants with seroconversion
Časové okno: 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
Časové okno: Day 01 and Day 43
Influenza vaccine antibody titers are measured by HAI assay
Day 01 and Day 43

Sekundární výstupní opatření

Měření výsledku
Popis opatření
Časové okno
Geometric mean titer of hemagglutination inhibition (HAI) assay antibody (Ab) titer obtained on Day 01, Day 22, Day 43, Day 202
Časové okno: 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
Časové okno: 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
Časové okno: 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)
Časové okno: 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
Časové okno: 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
Časové okno: 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
Časové okno: 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)
Časové okno: 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)
Časové okno: 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)
Časové okno: 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
Časové okno: Day 43
Influenza vaccine antibody titers are measured by serum neutralization (SN) assay
Day 43
Number of participants with detectable NT Ab titer
Časové okno: 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

Spolupracovníci a vyšetřovatelé

Zde najdete lidi a organizace zapojené do této studie.

Sponzor

Termíny studijních záznamů

Tato data sledují průběh záznamů studie a předkládání souhrnných výsledků na ClinicalTrials.gov. Záznamy ze studií a hlášené výsledky jsou před zveřejněním na veřejné webové stránce přezkoumány Národní lékařskou knihovnou (NLM), aby se ujistily, že splňují specifické standardy kontroly kvality.

Hlavní termíny studia

Začátek studia (Aktuální)

3. srpna 2026

Primární dokončení (Odhadovaný)

22. února 2028

Dokončení studie (Odhadovaný)

22. února 2028

Termíny zápisu do studia

První předloženo

31. července 2026

První předloženo, které splnilo kritéria kontroly kvality

19. srpna 2026

První zveřejněno (Aktuální)

21. srpna 2026

Aktualizace studijních záznamů

Poslední zveřejněná aktualizace (Aktuální)

15. září 2026

Odeslaná poslední aktualizace, která splnila kritéria kontroly kvality

11. září 2026

Naposledy ověřeno

1. září 2026

Více informací

Termíny související s touto studií

Další identifikační čísla studie

  • VBX21138
  • U1111-1325-2670 (Identifikátor registru: ICTRP)

Plán pro data jednotlivých účastníků (IPD)

Plánujete sdílet data jednotlivých účastníků (IPD)?

ANO

Popis plánu IPD

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

Informace o lécích a zařízeních, studijní dokumenty

Studuje lékový produkt regulovaný americkým FDA

Ano

Studuje produkt zařízení regulovaný americkým úřadem FDA

Ne

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