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BARDA BP-I-23-001 Gripe H5

29 de septiembre de 2026 actualizado por: Biomedical Advanced Research and Development Authority

Estudio de fase 2, aleatorizado, doble ciego, para evaluar la seguridad y la inmunogenicidad de las vacunas contra la influenza monovalentes inactivadas A/H5 en diferentes niveles de dosis de antígeno con adyuvante AS03® o MF59®

This BARDA-sponsored, randomized, double-blind, phase 2 study is designed to assess safety and immunogenicity of A/H5 inactivated monovalent influenza vaccines at different antigen dose levels adjuvanted with AS03 or MF59.

Descripción general del estudio

Estado

Terminado

Condiciones

Intervención / Tratamiento

Descripción detallada

This is a randomized, double-blind, phase 2 study to assess safety and immunogenicity of egg-based H5N8 and H5N1 influenza vaccines at different antigen dose levels (3.75, 7.5, and 15 μg) adjuvanted with AS03A full dose, AS03A half dose (H5N8 only), or MF59. AS03A is the adjuvant AS03®. Healthy adult male and female (non-pregnant) participants, aged 18 years and older, will be screened for baseline health status to ensure trial eligibility. Participants meeting all the inclusion and none of the exclusion criteria will be randomized to receive vaccine doses according to treatment groups defined by antigen (H5N1 or H5N8), antigen dose level (3.75, 7.5, and 15 μg), and adjuvant (AS03A full dose, AS03A half dose, or MF59). Two doses of adjuvanted vaccine separated by 21 days will be administered to approximately 1380 participants, including 780 participants 18 through 64 years old who will be randomized equally to 1 of 13 treatment groups (A, B, C, D, E, F, G, H, I, J, K, M, and N), and 600 participants ≥65 years old who will be randomized equally to 1 of 10 treatment groups (B, C, E, F, H, I, K, L, N, and O).

Safety assessments will be based on solicited Adverse Events (AEs) (local and systemic reactogenicity symptoms) with onset within 8 days following each vaccination, inclusive of the vaccination day (Day 1 through Day 8 and Day 22 through Day 29); unsolicited Treatment Emergent Adverse Events (TEAEs) with onset within 22 days following each vaccination, inclusive of the vaccination day (Day 1 through Day 22 and Day 22 through Day 43); and treatment-emergent Serious Adverse Events (SAEs), Potential Immune-Mediated Diseases (pIMDs), and Medically Attended Adverse Events (MAAEs) occurring during study participation (through Day 203). Immunogenicity assessments will include titer, seroprotection rate, and seroconversion rate based on serum Hemagglutination Inhibition (HAI) antibodies, and titer and seroconversion rate based on serum microneutralization (MN) antibodies. Study vaccines will be prepared and administered by unblinded personnel. All other trial assessments will be performed only by blinded personnel.

Tipo de estudio

Intervencionista

Inscripción (Actual)

1380

Fase

  • Fase 2

Contactos y Ubicaciones

Esta sección proporciona los datos de contacto de quienes realizan el estudio e información sobre dónde se lleva a cabo este estudio.

Ubicaciones de estudio

  • Estados Unidos
    • Georgia
      • Atlanta, Georgia, Estados Unidos, 30329
        • DelRicht Research - Atlanta
      • Savannah, Georgia, Estados Unidos, 31406
        • Javara Research - Privia Medical Group Georgia
    • Illinois
      • Oak Lawn, Illinois, Estados Unidos, 60453
        • Accellacare - Duly Health and Care - Oak Lawn
    • Kansas
      • Lenexa, Kansas, Estados Unidos, 66219
        • Johnson County Clin-Trials (JCCT)
      • Wichita, Kansas, Estados Unidos, 67207
        • Alliance for Multispecialty Research - Wichita East - Heartland Research Associates
    • Kentucky
      • Lexington, Kentucky, Estados Unidos, 40509
        • Alliance for Multispecialty Research - Lexington
    • Louisiana
      • New Orleans, Louisiana, Estados Unidos, 70115
        • DelRicht Research - New Orleans - Prytania Street
      • Prairieville, Louisiana, Estados Unidos, 70769
        • DelRicht Research - Prairieville
    • New York
      • New York, New York, Estados Unidos, 14609
        • Rochester Clinical Research
    • North Carolina
      • Cary, North Carolina, Estados Unidos, 27518
        • Accellacare - Cary
      • Hickory, North Carolina, Estados Unidos, 28601
        • Accellacare of Hickory
      • Statesville, North Carolina, Estados Unidos, 28625
        • Accellacare - Piedmont Healthcare
      • Wilmington, North Carolina, Estados Unidos, 28401
        • Accellacare - Tradd Court
    • Ohio
      • Cincinnati, Ohio, Estados Unidos, 45212
        • CTI Clinical Research Center
    • Oklahoma
      • Tulsa, Oklahoma, Estados Unidos, 74133
        • DelRicht Research - Tulsa
      • Yukon, Oklahoma, Estados Unidos, 73099
        • Tekton Research - Oklahoma - Primary Health Partners
    • Texas
      • Austin, Texas, Estados Unidos, 78745
        • Tekton Research - Austin
      • Conroe, Texas, Estados Unidos, 77384
        • Javara Research - Privia Medical Group Gulf Coast
      • San Antonio, Texas, Estados Unidos, 78229
        • Tekton Research - San Antonio
    • Virginia
      • Sterling, Virginia, Estados Unidos, 20166
        • DelRicht Research - Virgina

Criterios de participación

Los investigadores buscan personas que se ajusten a una determinada descripción, denominada criterio de elegibilidad. Algunos ejemplos de estos criterios son el estado de salud general de una persona o tratamientos previos.

Criterio de elegibilidad

Edades elegibles para estudiar

18 años y mayores (Adulto, Adulto Mayor)

Acepta Voluntarios Saludables

Sí

Géneros elegibles para el estudio

Todos

Descripción

Inclusion Criteria:

  1. Male or non-pregnant female, 18 years of age or older at the time of screening and informed consent.

  2. Willing and able to provide written informed consent prior to initiation of study procedures.

  3. Agrees to have specimens collected during this trial specifically for the purpose of future research stored for future research use.

  4. In relatively stable health, as determined by medical history and physical examination.

    a. Any chronic medical diagnoses or conditions should be stable and well managed, with no significant changes expected during the study period, and in the opinion of the site investigator, will not impact the ability to assess safety and/or immunogenicity per the study design.

  5. If a female of childbearing potential who is sexually active, agrees to use an adequate method of birth control from Screening through 4 weeks following the last study vaccination and has used an adequate birth control method for at least 2 months prior to Screening.

    a. Female of childbearing potential is defined as post onset menarche and pre-menopausal person capable of becoming pregnant. This does not include females who meet any of the following conditions:

    i. menopausal >2 years

    ii. tubal ligation >1 year

    iii. bilateral salpingo-oophorectomy

    iv. hysterectomy.

    b. Adequate contraception is defined as a contraceptive method with a failure rate of less than 1% per year when used consistently and correctly and when applicable, in accordance with the product label, for example: oral contraceptives, either combined or progestogen alone; injectable progestogen; implants of etonogestrel or levonorgestrel; estrogenic vaginal ring; percutaneous contraceptive patches; intrauterine device or intrauterine system; the female participant has exclusively female sexual partners; male partner is sterile or otherwise unable to produce sperm (information on the person's sterility can come from the site personnel's review of the participant's medical records or interview with the participant regarding her medical history); male condom combined with a vaginal spermicide (foam, gel, film, cream, or suppository); or male condom combined with a female diaphragm, either with or without a vaginal spermicide (foam, gel, film, cream, or suppository).

  6. Available for all study visits, willing to participate in all study procedures, and not planning to relocate from the area for the duration of the study.

Exclusion Criteria:

  1. Has an acute illness, as determined by the site investigator, within 72 hours prior to vaccination.

    a. An acute illness that is nearly resolved, with only minor residual symptoms remaining, is allowable if, in the opinion of the site investigator, the residual symptoms will not interfere with the ability of study staff to assess safety parameters as required by the protocol.

  2. Has a history of severe reaction to any influenza vaccine.

  3. Has a known allergy to squalene-based adjuvants.

  4. Female of childbearing potential who has a positive urine pregnancy test or who is currently breastfeeding.

  5. Has a body mass index >35 kg/m2 .

  6. Has known human immunodeficiency virus, hepatitis B, or hepatitis C infection (based on medical history).

  7. Has a history of any pIMDs (list provided in Protocol Appendix 3), neuralgia, paresthesia, neuritis, convulsions, or encephalomyelitis within 90 days prior to Screening, or a family history of Guillain-Barré syndrome.

  8. Has narcolepsy or a first degree relative with narcolepsy.

  9. Has a history of alcohol or drug abuse within 5 years prior to Screening.

  10. Has any diagnosis, current or past, of schizophrenia, bipolar disease, or any other psychiatric diagnosis that may, in the opinion of the site investigator, interfere with participant compliance or safety evaluations.

  11. Is immunosuppressed due to an underlying disease or medication, use of anticancer chemotherapy (cytotoxic), or radiation therapy.

  12. With the exception of basal or squamous cell skin cancer, has known active neoplastic disease, including hematologic malignancy.

  13. Has long-term use (≥14 consecutive days) of glucocorticoids including oral or parenteral prednisone or prednisone equivalent (>20 mg total dose per day) or high-dose inhaled steroids (>800 µg/day of beclomethasone dipropionate or equivalent) within 1 month prior to screening in this study. However, participants on low-dose inhaled steroids (≤800 µg/day of beclomethasone dipropionate or equivalent) or topical steroids are not excluded.

  14. Has received immunoglobulin or other blood product (with the exception of Rho[D] immune globulin) within the 90 days prior to screening in this study.

  15. Has received any (licensed or under Emergency Use Authorization [EUA]) live vaccines within 4 weeks or inactivated, messenger RNA (mRNA), or recombinant protein vaccines within 2 weeks prior to screening, or plans to receive such vaccines (including seasonal influenza and COVID-19 vaccines) from screening through 22 days following the second dose of the study vaccine, inclusive of the vaccination day (Screening Visit through Day 43).

  16. Is participating or plans to participate in another interventional clinical trial (either active or follow-up phase) during the study period.

  17. Has participated in an A(H5) influenza vaccine study in the past or has a history of A(H5) influenza infection prior to vaccination in this study. This includes, but is not limited to, influenza sub-types A(H5N1), A(H5N8), and A(H5N6).

  18. Has any laboratory test result or clinical findings (including vital signs) that singly or in combination are likely to unfavorably alter the risks of participant participation or to confound study safety or immunogenicity results, in the opinion of the site investigator. Additionally, the following are exclusionary:

    1. Alanine aminotransferase (ALT) or aspartate aminotransferase (AST) >2 times the upper limit of normal (ULN), or
    2. Bilirubin >1.5 times the ULN unless isolated Gilbert's syndrome.

  19. Has any disease or medical condition that, in the opinion of the site investigator, might confound interpretation of safety or immunogenicity.

Plan de estudios

Esta sección proporciona detalles del plan de estudio, incluido cómo está diseñado el estudio y qué mide el estudio.

¿Cómo está diseñado el estudio?

Detalles de diseño

  • Propósito principal: Otro
  • Asignación: Aleatorizado
  • Modelo Intervencionista: Asignación paralela
  • Enmascaramiento: Cuadruplicar

Armas e Intervenciones

Grupo de participantes/brazo
Intervención / Tratamiento
Experimental: Treatment Group A

This treatment group of 60 participants (ages 18-64) in Treatment Group A will receive 3.75 µg of Egg-A/Astrakhan/3212/2020 (H5N8) antigen adjuvanted with a full dose of AS03A.
Biológico: 3.75 µg H5N8 antigen plus full dose AS03A

Two intramuscular doses (21 days apart) of AS03A adjuvanted H5N8 vaccine.
Experimental: Treatment Group B

This treatment group of 120 participants (60 participants ages 18-64 and 60 participants ages ≥65) in Treatment Group B will receive 7.5 µg of Egg-A/Astrakhan/3212/2020 (H5N8) adjuvanted with a full dose of AS03A.
Biológico: 7.5 µg H5N8 antigen plus full dose AS03A

Two intramuscular doses (21 days apart) of AS03A adjuvanted H5N8 vaccine.
Experimental: Treatment Group C

This treatment group of 120 participants (60 participants ages 18-64 and 60 participants age ≥65) will receive 15 µg of Egg-A/Astrakhan/3212/2020 (H5N8) adjuvanted with a full dose of AS03A.
Biológico: 15 µg H5N8 antigen plus full dose AS03A

Two intramuscular doses (21 days apart) of AS03A adjuvanted H5N8 vaccine.
Experimental: Treatment Group D

This treatment group of 60 participants (ages 18-64) will receive 3.75 µg of Egg-A/Astrakhan/3212/2020 (H5N8) adjuvanted with a half dose of AS03A.
Biológico: 3.75 µg H5N8 antigen plus half dose AS03A

Two intramuscular doses (21 days apart) of AS03A adjuvanted H5N8 vaccine.
Experimental: Treatment Group E

This treatment group of 120 participants (60 participants ages 18-64 and 60 participants age ≥65) will receive 7.5 µg of Egg-A/Astrakhan/3212/2020 (H5N8) adjuvanted with a half dose of AS03A.
Biológico: 7.5 µg H5N8 antigen plus half dose AS03A

Two intramuscular doses (21 days apart) of AS03A adjuvanted H5N8 vaccine.
Experimental: Treatment Group F

This treatment group of 120 participants (60 participants ages 18-64 and 60 participants age ≥65 will receive 15 µg of Egg-A/Astrakhan/3212/2020 (H5N8) adjuvanted with a half dose of AS03A.
Biológico: 15 µg H5N8 antigen plus half dose AS03A

Two intramuscular doses (21 days apart) of AS03A adjuvanted H5N8 vaccine.
Experimental: Treatment Group G

This treatment group of 60 participants (ages 18-64) will receive 3.75 µg of Egg-A/Astrakhan/3212/2020 (H5N8) adjuvanted with MF59.
Biológico: 3.75 µg H5N8 antigen plus MF59

Two intramuscular doses (21 days apart) of MF59 adjuvanted H5N8 vaccine.
Experimental: Treatment Group H

This treatment group of 120 participants (60 participants ages 18-64 and 60 participants age ≥65) will receive 7.5 µg of Egg-A/Astrakhan/3212/2020 (H5N8) adjuvanted with MF59.
Biológico: 7.5 µg H5N8 antigen plus MF59

Two intramuscular doses (21 days apart) of MF59 adjuvanted H5N8 vaccine.
Experimental: Treatment Group I

This treatment group of 120 participants (60 participants ages 18-64 and 60 participants age ≥65) will receive 15 µg of Egg-A/Astrakhan/3212/2020 (H5N8) adjuvanted with MF59.
Biológico: 15 µg H5N8 antigen plus MF59

Two intramuscular doses (21 days apart) of MF59 adjuvanted H5N8 vaccine.
Experimental: Treatment Group J

This treatment group of 60 participants (ages 18-64) will receive 3.75 µg of Egg-A/bar-headed goose/Qinghai Lake/1A/2005 (H5N1) adjuvanted with a full dose of AS03A.
Biológico: 3.75 µg H5N1 antigen plus full dose AS03A

Two intramuscular doses (21 days apart) of AS03A adjuvanted H5N1 vaccine.
Experimental: Treatment Group K

This treatment group of 120 participants (60 participants ages 18-64 and 60 participants age ≥65) will receive 7.5 µg of Egg-A/bar-headed goose/Qinghai Lake/1A/2005 (H5N1) adjuvanted with a full dose of AS03A.
Biológico: 7.5 µg H5N1 antigen plus full dose AS03A

Two intramuscular doses (21 days apart) of AS03A adjuvanted H5N1 vaccine.
Experimental: Treatment Group L

This treatment group of 60 participants (ages ≥65) will receive 15 µg of Egg-A/bar-headed goose/Qinghai Lake/1A/2005 (H5N1) adjuvanted with a full dose of AS03A.
Biológico: 15 µg H5N1 antigen plus full dose AS03A

Two intramuscular doses (21 days apart) of AS03A adjuvanted H5N1 vaccine.
Experimental: Treatment Group M

This treatment group of 60 participants (ages 18-64) will receive 3.75 µg of Egg-A/bar-headed goose/Qinghai Lake/1A/2005 (H5N1) adjuvanted with MF59.
Biológico: 3.75 µg H5N1 antigen plus MF59

Two intramuscular doses (21 days apart) of MF59 adjuvanted H5N1 vaccine.
Experimental: Treatment Group N

This treatment group of 120 participants (60 participants ages 18-64 and 60 participants age ≥65) will receive 7.5 µg of Egg-A/bar-headed goose/Qinghai Lake/1A/2005 (H5N1) adjuvanted with MF59.
Biológico: 7.5 µg H5N1 antigen plus MF59

Two intramuscular doses (21 days apart) of MF59 adjuvanted H5N1 vaccine.
Experimental: Treatment Group O

This treatment group of 60 participants (age ≥65) will receive 15 µg of Egg-A/bar-headed goose/Qinghai Lake/1A/2005 (H5N1) adjuvanted with MF59.
Biológico: 15 µg H5N1 antigen plus MF59

Two intramuscular doses (21 days apart) of MF59 adjuvanted H5N1 vaccine.

¿Qué mide el estudio?

Medidas de resultado primarias

Medida de resultado
Medida Descripción
Periodo de tiempo
The Percentage of Participants Who Experience Any Solicited Local Reactogenicity Symptom Occurring Within 8 Days of Each Vaccination, Inclusive of the Vaccination Day.
Periodo de tiempo: Day 1 through Day 8 and Day 22 through Day 29

The percentage of participants who experienced at least one solicited local reactogenicity adverse event at the injection site during at least one of the time frames specified. Possible reactions included erythema/redness, induration (underlying hardening of tissue associated with inflammation)/swelling (localized tissue distention), and pain.
Day 1 through Day 8 and Day 22 through Day 29
The Percentage of Participants Who Experience Any Solicited Systemic Reactogenicity Symptom Occurring Within 8 Days of Each Vaccination, Inclusive of the Vaccination Day.
Periodo de tiempo: Day 1 through Day 8 and Day 22 through Day 29

The percentage of participants who experienced at least one solicited systemic reactogenicity adverse event during at least one of the time frames specified. Possible reactions included fever, myalgia, arthralgia, fatigue, headache, nausea, vomiting, diarrhea, and chills.
Day 1 through Day 8 and Day 22 through Day 29
The Percentage of Participants Achieving Seroprotection at Day 43 Based on Serum HAI Antibody Titers (≥1:40) to A/Astrakhan (H5N8).
Periodo de tiempo: Day 43

The percentage of participants achieving seroprotection, defined as serum HAI antibody titer ≥ 1:40 against the H5N8 antigen. A titer of 1:40 or greater is considered to be a sufficient amount of antibody to avoid infection in half of exposed individuals.
Day 43

Medidas de resultado secundarias

Medida de resultado
Medida Descripción
Periodo de tiempo
The Percentage of Participants Who Experience Any Unsolicited Treatment-emergent Adverse Event (TEAE) Within 22 Days of Each Vaccination, Inclusive of the Vaccination Day.
Periodo de tiempo: Day 1 through Day 22 and Day 22 through Day 43

The percentage of participants who experienced at least one unsolicited TEAE during at least one of the time frames specified. Unsolicited TEAEs were defined as any adverse event other than those included in the lists for solicited local and systemic reactions.
Day 1 through Day 22 and Day 22 through Day 43
The Percentage of Participants Who Experience Any Treatment-emergent Serious Adverse Event (SAE).
Periodo de tiempo: Day 1 through Day 203

The percentage of participants who experienced at least one treatment-emergent SAE during the time frame specified.
Day 1 through Day 203
The Percentage of Participants Who Experience Any Treatment-emergent Medically Attended Adverse Events (MAAE).
Periodo de tiempo: Day 1 through Day 203

The percentage of participants who experienced at least one treatment-emergent MAAE during the time frame specified. MAAEs were defined as adverse events with medically attended visits including hospital, emergency room, urgent care clinic, or other visits to or from medical personnel for any reason.
Day 1 through Day 203
The Percentage of Participants Who Experience Any Treatment-emergent Potentially Immune-mediated Disease (pIMD).
Periodo de tiempo: Day 1 through Day 203

The percentage of participants who experienced at least one treatment-emergent pIMD during the time frame specified. A comprehensive list of adverse events to be reported as pIMDs is available in Appendix 3 of the Protocol.
Day 1 through Day 203
The Percentage of Participants Achieving Seroprotection at Day 43 Based on Serum HAI Antibody Titers (≥1:40) to A/Bar-headed Goose (H5N1).
Periodo de tiempo: Day 43

The percentage of participants achieving seroprotection, defined as serum HAI antibody titer ≥ 1:40 against the H5N1 antigen. A titer of 1:40 or greater is considered to be a sufficient amount of antibody to avoid infection in half of exposed individuals.
Day 43
Serum HAI Antibody Titers to A/Astrakhan (H5N8) at Screening.
Periodo de tiempo: Screening (i.e., pre-vaccination)

Serum HAI antibody titer levels against the H5N8 antigen. A higher HAI titer means a better immune response against the antigen.
Screening (i.e., pre-vaccination)
Serum HAI Antibody Titers to A/Astrakhan (H5N8) at Day 22.
Periodo de tiempo: Day 22

Serum HAI antibody titer levels against the H5N8 antigen. A higher HAI titer means a better immune response against the antigen.
Day 22
Serum HAI Antibody Titers to A/Astrakhan (H5N8) at Day 43.
Periodo de tiempo: Day 43

Serum HAI antibody titer levels against the H5N8 antigen. A higher HAI titer means a better immune response against the antigen.
Day 43
Serum HAI Antibody Titers to A/Astrakhan (H5N8) at Day 203.
Periodo de tiempo: Day 203

Serum HAI antibody titer levels against the H5N8 antigen. A higher HAI titer means a better immune response against the antigen.
Day 203
Serum HAI Antibody Titers to A/Bar-headed Goose (H5N1) at Screening.
Periodo de tiempo: Screening (i.e., pre-vaccination)

Serum HAI antibody titer levels against the H5N1 antigen. A higher HAI titer means a better immune response against the antigen.
Screening (i.e., pre-vaccination)
Serum HAI Antibody Titers to A/Bar-headed Goose (H5N1) at Day 22.
Periodo de tiempo: Day 22

Serum HAI antibody titer levels against the H5N1 antigen. A higher HAI titer means a better immune response against the antigen.
Day 22
Serum HAI Antibody Titers to A/Bar-headed Goose (H5N1) at Day 43.
Periodo de tiempo: Day 43

Serum HAI antibody titer levels against the H5N1 antigen. A higher HAI titer means a better immune response against the antigen.
Day 43
Serum HAI Antibody Titers to A/Bar-headed Goose (H5N1) at Day 203
Periodo de tiempo: Day 203

Serum HAI antibody titer levels against the H5N1 antigen. A higher HAI titer means a better immune response against the antigen.
Day 203
The Percentage of Participants Achieving Seroprotection at Day 22 Based on Serum HAI Antibody Titers (≥1:40) to A/Astrakhan (H5N8).
Periodo de tiempo: Day 22

The percentage of participants achieving seroprotection, defined as serum HAI antibody titer ≥ 1:40 against the H5N8 antigen. A titer of 1:40 or greater is considered to be a sufficient amount of antibody to avoid infection in half of exposed individuals.
Day 22
The Percentage of Participants Achieving Seroprotection at Day 203 Based on Serum HAI Antibody Titers (≥1:40) to A/Astrakhan (H5N8).
Periodo de tiempo: Day 203

The percentage of participants achieving seroprotection, defined as serum HAI antibody titer ≥ 1:40 against the H5N8 antigen. A titer of 1:40 or greater is considered to be a sufficient amount of antibody to avoid infection in half of exposed individuals.
Day 203
The Percentage of Participants Achieving Seroprotection at Day 22 Based on Serum HAI Antibody Titers (≥1:40) to A/Bar-headed Goose (H5N1).
Periodo de tiempo: Day 22

The percentage of participants achieving seroprotection, defined as serum HAI antibody titer ≥ 1:40 against the H5N1 antigen. A titer of 1:40 or greater is considered to be a sufficient amount of antibody to avoid infection in half of exposed individuals.
Day 22
The Percentage of Participants Achieving Seroprotection at Day 203 Based on Serum HAI Antibody Titers (≥1:40) to A/Bar-headed Goose (H5N1).
Periodo de tiempo: Day 203

The percentage of participants achieving seroprotection, defined as serum HAI antibody titer ≥ 1:40 against the H5N1 antigen. A titer of 1:40 or greater is considered to be a sufficient amount of antibody to avoid infection in half of exposed individuals.
Day 203
The Percentage of Participants Achieving Seroconversion at Day 22 Based on Serum HAI Antibody Titers to A/Astrakhan (H5N8).
Periodo de tiempo: Day 22

The percentage of participants achieving seroconversion, defined as either a pre-vaccination HAI antibody titer <1:10 and a post-vaccination HAI titer ≥ 1:40, or a pre-vaccination HAI titer ≥1:10 and a minimum 4-fold rise in post-vaccination HAI titer against the H5N8 antigen. Seroconversion represents the minimum intended effect of vaccination.
Day 22
The Percentage of Participants Achieving Seroconversion at Day 43 Based on Serum HAI Antibody Titers to A/Astrakhan (H5N8).
Periodo de tiempo: Day 43

The percentage of participants achieving seroconversion, defined as either a pre-vaccination HAI antibody titer <1:10 and a post-vaccination HAI titer ≥ 1:40, or a pre-vaccination HAI titer ≥1:10 and a minimum 4-fold rise in post-vaccination HAI titer against the H5N8 antigen. Seroconversion represents the minimum intended effect of vaccination.
Day 43
The Percentage of Participants Achieving Seroconversion at Day 203 Based on Serum HAI Antibody Titers to A/Astrakhan (H5N8).
Periodo de tiempo: Day 203

The percentage of participants achieving seroconversion, defined as either a pre-vaccination HAI antibody titer <1:10 and a post-vaccination HAI titer ≥ 1:40, or a pre-vaccination HAI titer ≥1:10 and a minimum 4-fold rise in post-vaccination HAI titer against the H5N8 antigen. Seroconversion represents the minimum intended effect of vaccination.
Day 203
The Percentage of Participants Achieving Seroconversion at Day 22 Based on Serum HAI Antibody Titers to A/Bar-headed Goose (H5N1).
Periodo de tiempo: Day 22

The percentage of participants achieving seroconversion, defined as either a pre-vaccination HAI antibody titer <1:10 and a post-vaccination HAI titer ≥ 1:40, or a pre-vaccination HAI titer ≥1:10 and a minimum 4-fold rise in post-vaccination HAI titer against the H5N1 antigen. Seroconversion represents the minimum intended effect of vaccination.
Day 22
The Percentage of Participants Achieving Seroconversion at Day 43 Based on Serum HAI Antibody Titers to A/Bar-headed Goose (H5N1).
Periodo de tiempo: Day 43

The percentage of participants achieving seroconversion, defined as either a pre-vaccination HAI antibody titer <1:10 and a post-vaccination HAI titer ≥ 1:40, or a pre-vaccination HAI titer ≥1:10 and a minimum 4-fold rise in post-vaccination HAI titer against the H5N1 antigen. Seroconversion represents the minimum intended effect of vaccination.
Day 43
The Percentage of Participants Achieving Seroconversion at Day 203 Based on Serum HAI Antibody Titers to A/Bar-headed Goose (H5N1).
Periodo de tiempo: Day 203

The percentage of participants achieving seroconversion, defined as either a pre-vaccination HAI antibody titer <1:10 and a post-vaccination HAI titer ≥ 1:40, or a pre-vaccination HAI titer ≥1:10 and a minimum 4-fold rise in post-vaccination HAI titer against the H5N1 antigen. Seroconversion represents the minimum intended effect of vaccination.
Day 203
Serum MN Antibody Titers to A/Astrakhan (H5N8) at Screening.
Periodo de tiempo: Screening (i.e., pre-vaccination)

Serum MN antibody titer levels against the H5N8 antigen. A higher MN titer means a better immune response against the antigen.
Screening (i.e., pre-vaccination)
Serum MN Antibody Titers to A/Astrakhan (H5N8) at Day 22.
Periodo de tiempo: Day 22

Serum MN antibody titer levels against the H5N8 antigen. A higher MN titer means a better immune response against the antigen.
Day 22
Serum MN Antibody Titers to A/Astrakhan (H5N8) at Day 43.
Periodo de tiempo: Day 43

Serum MN antibody titer levels against the H5N8 antigen. A higher MN titer means a better immune response against the antigen.
Day 43
Serum MN Antibody Titers to A/Astrakhan (H5N8) at Day 203.
Periodo de tiempo: Day 203

Serum MN antibody titer levels against the H5N8 antigen. A higher MN titer means a better immune response against the antigen.
Day 203
Serum MN Antibody Titers to A/Bar-headed Goose (H5N1) at Screening.
Periodo de tiempo: Screening (i.e., pre-vaccination)

Serum MN antibody titer levels against the H5N1 antigen. A higher MN titer means a better immune response against the antigen.
Screening (i.e., pre-vaccination)
Serum MN Antibody Titers to A/Bar-headed Goose (H5N1) at Day 22.
Periodo de tiempo: Day 22

Serum MN antibody titer levels against the H5N1 antigen. A higher MN titer means a better immune response against the antigen.
Day 22
Serum MN Antibody Titers to A/Bar-headed Goose (H5N1) at Day 43.
Periodo de tiempo: Day 43

Serum MN antibody titer levels against the H5N1 antigen. A higher MN titer means a better immune response against the antigen.
Day 43
Serum MN Antibody Titers to A/Bar-headed Goose (H5N1) at Day 203.
Periodo de tiempo: Day 203

Serum MN antibody titer levels against the H5N1 antigen. A higher MN titer means a better immune response against the antigen.
Day 203
The Percentage of Participants Achieving Seroconversion at Day 22 Based on Serum MN Antibody Titers to A/Astrakhan (H5N8).
Periodo de tiempo: Day 22

The percentage of participants achieving seroconversion, defined as either a pre-vaccination MN antibody titer <1:10 and a post-vaccination MN titer ≥ 1:40, or a pre-vaccination MN titer ≥1:10 and a minimum 4-fold rise in post-vaccination MN titer against the H5N8 antigen. Seroconversion represents the minimum intended effect of vaccination.
Day 22
The Percentage of Participants Achieving Seroconversion at Day 43 Based on Serum MN Antibody Titers to A/Astrakhan (H5N8).
Periodo de tiempo: Day 43

The percentage of participants achieving seroconversion, defined as either a pre-vaccination MN antibody titer <1:10 and a post-vaccination MN titer ≥ 1:40, or a pre-vaccination MN titer ≥1:10 and a minimum 4-fold rise in post-vaccination MN titer against the H5N8 antigen. Seroconversion represents the minimum intended effect of vaccination.
Day 43
The Percentage of Participants Achieving Seroconversion at Day 203 Based on Serum MN Antibody Titers to A/Astrakhan (H5N8).
Periodo de tiempo: Day 203

The percentage of participants achieving seroconversion, defined as either a pre-vaccination MN antibody titer <1:10 and a post-vaccination MN titer ≥ 1:40, or a pre-vaccination MN titer ≥1:10 and a minimum 4-fold rise in post-vaccination MN titer against the H5N8 antigen. Seroconversion represents the minimum intended effect of vaccination.
Day 203
The Percentage of Participants Achieving Seroconversion at Day 22 Based on Serum MN Antibody Titers to A/Bar-headed Goose (H5N1).
Periodo de tiempo: Day 22

The percentage of participants achieving seroconversion, defined as either a pre-vaccination MN antibody titer <1:10 and a post-vaccination MN titer ≥ 1:40, or a pre-vaccination MN titer ≥1:10 and a minimum 4-fold rise in post-vaccination MN titer against the H5N1 antigen. Seroconversion represents the minimum intended effect of vaccination.
Day 22
The Percentage of Participants Achieving Seroconversion at Day 43 Based on Serum MN Antibody Titers to A/Bar-headed Goose (H5N1).
Periodo de tiempo: Day 43

The percentage of participants achieving seroconversion, defined as either a pre-vaccination MN antibody titer <1:10 and a post-vaccination MN titer ≥ 1:40, or a pre-vaccination MN titer ≥1:10 and a minimum 4-fold rise in post-vaccination MN titer against the H5N1 antigen. Seroconversion represents the minimum intended effect of vaccination.
Day 43
The Percentage of Participants Achieving Seroconversion at Day 203 Based on Serum MN Antibody Titers to A/Bar-headed Goose (H5N1).
Periodo de tiempo: Day 203

The percentage of participants achieving seroconversion, defined as either a pre-vaccination MN antibody titer <1:10 and a post-vaccination MN titer ≥ 1:40, or a pre-vaccination MN titer ≥1:10 and a minimum 4-fold rise in post-vaccination MN titer against the H5N1 antigen. Seroconversion represents the minimum intended effect of vaccination.
Day 203

Colaboradores e Investigadores

Aquí es donde encontrará personas y organizaciones involucradas en este estudio.

Patrocinador

Biomedical Advanced Research and Development Authority

Colaboradores

Rho Federal Systems Division, Inc.
ICON plc

Fechas de registro del estudio

Estas fechas rastrean el progreso del registro del estudio y los envíos de resultados resumidos a ClinicalTrials.gov. Los registros del estudio y los resultados informados son revisados ​​por la Biblioteca Nacional de Medicina (NLM) para asegurarse de que cumplan con los estándares de control de calidad específicos antes de publicarlos en el sitio web público.

Fechas importantes del estudio

Inicio del estudio (Actual)

21 de agosto de 2024

Finalización primaria (Actual)

16 de enero de 2025

Finalización del estudio (Actual)

11 de junio de 2025

Fechas de registro del estudio

Enviado por primera vez

15 de agosto de 2024

Primero enviado que cumplió con los criterios de control de calidad

15 de agosto de 2024

Publicado por primera vez (Actual)

19 de agosto de 2024

Actualizaciones de registros de estudio

Última actualización publicada (Actual)

1 de octubre de 2026

Última actualización enviada que cumplió con los criterios de control de calidad

29 de septiembre de 2026

Última verificación

1 de septiembre de 2026

Más información

Términos relacionados con este estudio

Palabras clave

Términos MeSH relevantes adicionales

Otros números de identificación del estudio

  • BP-I-23-001
  • 75A50120D00015/75A50123F33006 (Otro identificador: BARDA)
  • 75A50120D00017/75A50123F33007 (Otro identificador: BARDA)

Información sobre medicamentos y dispositivos, documentos del estudio

Estudia un producto farmacéutico regulado por la FDA de EE. UU.

Sí

Estudia un producto de dispositivo regulado por la FDA de EE. UU.

No

Esta información se obtuvo directamente del sitio web clinicaltrials.gov sin cambios. Si tiene alguna solicitud para cambiar, eliminar o actualizar los detalles de su estudio, comuníquese con register@clinicaltrials.gov. Tan pronto como se implemente un cambio en clinicaltrials.gov, también se actualizará automáticamente en nuestro sitio web. .

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