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Completed

NCT Number: NCT02509494

Staged Phase 3 Study to Assess the Safety and Immunogenicity of Ebola Candidate Vaccines Ad26.ZEBOV and MVA-BN-Filo

The purpose of this study is the evaluation of the safety and immunogenicity of two candidate Ebola vaccines Ad26.ZEBOV and MVA-BN-Filo, in a 2-dose heterologous regimen.

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Key information

Conditions

Ebola Virus Disease Filoviridae Infections Hemorrhagic Fever, Ebola Hemorrhagic Fevers, Viral Infections Mononegavirales Infections RNA Virus Infections Virus Diseases

Age range

1 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 3

Primary location

Freetown, Sierra Leone

About this study

This is staged Phase 3 study to gather information on the safety and immunogenicity of a 2-dose heterologous regimen. In this regimen, Ad26.ZEBOV will be administered as a Dose 1 vaccination followed by the candidate vaccine MVA-BN-Filo (Dose 2 56 days later) and a booster dose of A26.ZEBOV will be administered 2 years post Dose 1 vaccination to participants in Stage 1 who consent to this. The study will take place in Sierra Leone and will consist of a screening phase, an active phase (vaccination) and a follow-up phase. The active phase of the study will be conducted initially in two stages. In the first stage approximately 40 adults aged 18 years or older will be vaccinated to gain information about the safety and immunogenicity of the 2-dose heterologous vaccine regimen. In stage 2 a larger group of approximately 976 individuals will be vaccinated to further evaluate the safety and immunogenicity of the 2 dose heterologous vaccine regimen across different age groups. In this stage, children aged 1 year or older, adolescents and adults will be included. Solicited local and systemic adverse events will be collected until 7 days after the Dose 1 and Dose 2 vaccination. Unsolicited adverse events will be collected from signing of the informed consent form (ICF) onwards until 56 days after the Dose 2 vaccination in Stage 1 and then again from the day of the booster vaccination until 28 days after the booster vaccination, and until 28 days after each vaccination in stage 2. Serious adverse events will be collected from signing of the ICF onwards until 12 and 36 months after the Dose 1 vaccination in Stage 2 and Stage 1, respectively. These data will be reviewed by an independent data monitoring committee (IDMC) to assess whether initiation of vaccination in the next stage or age group can be provided. Safety evaluations will include assessment of adverse events, which will be monitored throughout the study. Participants in Stage 2 will be followed up for safety and immunogenicity until 12 months (children and adolescents) or 24 months (adults) after the Dose 1 vaccination. Participants in Stage 1 will be followed up for safety and immunogenicity until 36 months after the Dose 1 vaccination or until 1 year after the booster vaccination.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

Stage 1 and 2:

  • Documented community engagement from community leader and a signed inform consent form (ICF) from each participant must be available
  • Participant Stage 1 must be 18 years or older at screening and be resident in selected study community with no intention to move from study area within the next 5 months
  • Participant must be healthy with no abnormalities in laboratory screening tests within 28 days before Dose 1 vaccination
  • Female participants of childbearing potential must use adequate birth control measures and must have a negative pregnancy test at screening and immediately prior to each study vaccination
  • Participant must pass the test of understanding (TOU)

Additional Inclusion criteria Stage 2:

  • One year or older at screening (children of enrolled parents are eligible)
  • Parent/legal guardian (for children) must pass the TOU before signing the ICF
  • Subjects aged 7 years and older will be asked to give positive assent in the presence of a witness

Exclusion criteria

  • Diagnosed with EVD or under quarantine/exposed to Ebola or body temperature equal of >= 38 degree Celsius (fever)
  • Having an acute illness (mild in nature that can be treated at home) or any clinically significant acute/chronic medical condition or having a decreased number of red blood cells/hemoglobin in the blood (anemia)
  • Previously participated in another Ebola interventional study or received any Ad26/MVA-based candidate vaccine
  • Vaccinated with live attenuated vaccines within 30 days or with inactivated vaccines 15 days before Dose 1 vaccination
  • Treated with an immunosuppressive drug at the time of screening

Additional exclusion criteria:

  • Children up to 5 years of age with severe malnutrition (underweight or Z-score weight <2)

Treatment and study plan

Ad26.ZEBOV

Biological

Ebola Zaire vaccine, replication incompetent vaccine, sterile suspension of 0.5 milliliter (mL) intramuscular (IM) injection of 5*10^10 viral particles.

MVA-BN-Filo

Biological

MVA-BN-Filo- is a non-replicating vaccine, 0.5 mL IM injection of 1*10^8 Infectious Unit (Inf. U.).

MenACWY

Biological

MenACWY is a WHO-prequalified Meningococcal Group A, C, W135 and Y conjugate vaccine.

Placebo

Biological

0.9% saline for injection.

Primary outcomes

  1. Stages 1 and 2: Number of Participants With Solicited Local Adverse Events (AEs) (Day 8)

    Time frame: 7 days post dose 1 (Day 8)

    Number of participants with solicited local AEs were reported. Solicited local AEs were pre-defined local (at the injection site) AEs for which participants were specifically questioned and which were noted by participants in their diary for 7 days post vaccination. Solicited local AEs were: injection site pain/tenderness, erythema, induration/swelling, itching at the vaccination site.

  2. Stages 1 and 2: Number of Participants With Solicited Local AEs (Day 64)

    Time frame: 7 days post dose 2 (Day 64)

    Number of participants with solicited local AEs were reported. Solicited local AEs were pre-defined local (at the injection site) AEs for which participants were specifically questioned and which were noted by participants in their diary for 7 days post vaccination. Solicited local AEs were: injection site pain/tenderness, erythema, induration/swelling, itching at the vaccination site.

  3. Stage 1: Number of Participants With Solicited Local AEs (Day 738)

    Time frame: 7 days post dose 3 (Day 738)

    Number of participants with solicited local AEs were reported. Solicited local AEs were pre-defined local (at the injection site) AEs for which participants were specifically questioned and which were noted by participants in their diary for 7 days post vaccination. Solicited local AEs were: injection site pain/tenderness, erythema, induration/swelling, itching at the vaccination site.

  4. Stages 1 and 2: Number of Participants With Solicited Systemic AEs (Day 8)

    Time frame: 7 days post dose 1 (Day 8)

    Number of participants with solicited systemic AEs were reported. Solicited systemic AEs included body temperature, vomiting, reduced activity, somnolence, fatigue, irritability/fussiness/crying/screaming, and loss of appetite (for preverbal children/infants) and body temperature, nausea/vomiting, fatigue/malaise, muscle pain, chills, joint pain and headache (for young children, adolescents, and adults).

  5. Stages 1 and 2: Number of Participants With Solicited Systemic AEs (Day 64)

    Time frame: 7 days post dose 2 (Day 64)

    Number of participants with solicited systemic AEs were reported. Solicited systemic AEs included body temperature, vomiting, reduced activity, somnolence, fatigue, irritability/fussiness/crying/screaming, and loss of appetite (for preverbal children/infants) and body temperature, nausea/vomiting, fatigue/malaise, muscle pain, chills, joint pain and headache (for young children, adolescents, and adults).

  6. Stage 1: Number of Participants With Solicited Systemic AEs (Day 738)

    Time frame: 7 days post dose 3 (Up to Day 738)

    Number of participants with solicited systemic AEs were reported. Solicited systemic AEs included body temperature, vomiting, reduced activity, somnolence, fatigue, irritability/fussiness/crying/screaming, and loss of appetite (for preverbal children/infants) and body temperature, nausea/vomiting, fatigue/malaise, muscle pain, chills, joint pain and headache (for young children, adolescents, and adults).

  7. Stages 1: Number of Participants With Serious Adverse Events (SAEs)

    Time frame: Up to 36 months

    Number of Participants with SAEs were reported. SAE is any untoward medical occurrence that at any dose may result in death, is life-threatening, requires inpatient hospitalization or prolongation of existing hospitalization, results in persistent or significant disability/incapacity, is a congenital anomaly/birth defect, is a suspected transmission of any infectious agent via a medicinal product.

  8. Stages 2: Number of Participants With SAEs

    Time frame: Up to 24 months

    Number of Participants with SAEs were reported. SAE is any untoward medical occurrence that at any dose may result in death, is life-threatening, requires inpatient hospitalization or prolongation of existing hospitalization, results in persistent or significant disability/incapacity, is a congenital anomaly/birth defect, is a suspected transmission of any infectious agent via a medicinal product.

  9. Stage 1: Number of Participants With Unsolicited AEs (Day 759)

    Time frame: 28 days post booster dose (Day 759)

    Number of participants with unsolicited AEs were reported. Unsolicited AEs were all AEs for which the participant is not specifically questioned in the participant diary.

  10. Stage 1: Number of Participants With Unsolicited AEs (Day 29)

    Time frame: 28 days post dose 1 (Day 29)

    Number of participants with unsolicited AEs were reported. Unsolicited AEs were all AEs for which the participant is not specifically questioned in the participant diary.

  11. Stage 2: Number of Participants With Unsolicited AEs (Day 29)

    Time frame: 28 days post dose 1 (Day 29)

    Number of participants with unsolicited AEs were reported. Unsolicited AEs were all AEs for which the participant is not specifically questioned in the participant diary.

  12. Stage 1: Number of Participants With Unsolicited AEs (Day 85)

    Time frame: 28 days post dose 2 (Day 85)

    Number of participants with unsolicited AEs were reported. Unsolicited AEs were all AEs for which the participant is not specifically questioned in the participant diary.

  13. Stage 2: Number of Participants With Unsolicited AEs (Day 85)

    Time frame: 28 days post dose 2 (Day 85)

    Number of participants with unsolicited AEs were reported. Unsolicited AEs were all AEs for which the participant is not specifically questioned in the participant diary.

  14. Stage 1: Number of Participants With Deaths

    Time frame: Up to 36 months

    Number of participants with deaths were reported.

  15. Stage 2: Number of Participants With Deaths (Children and Adolescents)

    Time frame: Up to 12 months

    Number of participants (children and adolescents) with deaths were reported.

  16. Stage 2: Number of Participants With Deaths (Adults)

    Time frame: Up to 24 months

    Number of participants (adults) with deaths were reported.

  17. Stage 1: Number of Participants With Immediate Reportable Event (IREs)

    Time frame: Up to 36 months

    Number of participants with IREs were reported. The following list of neuroinflammatory disorders are categorized as IREs: Cranial nerve disorders, including paralyses/paresis, optic neuritis, multiple sclerosis, transverse myelitis, guillain-Barré syndrome, acute disseminated encephalomyelitis, including site specific variants, myasthenia gravis and Lambert-Eaton myasthenic syndrome, immune-mediated peripheral neuropathies and plexopathies, narcolepsy, isolated paresthesia of greater than (>) 7 days duration.

  18. Stage 2: Number of Participants With IREs (Children and Adolescents)

    Time frame: Up to 12 months

    Number of participants (children and adolescents) with IREs were reported. The following list of neuroinflammatory disorders are categorized as IREs: Cranial nerve disorders, including paralyses/paresis, optic neuritis, multiple sclerosis, transverse myelitis, guillain-Barré syndrome, acute disseminated encephalomyelitis, including site specific variants, myasthenia gravis and Lambert-Eaton myasthenic syndrome, immune-mediated peripheral neuropathies and plexopathies, narcolepsy, isolated paresthesia of greater than (>) 7 days duration.

  19. Stage 2: Number of Participants With IREs (Adults)

    Time frame: Up to 24 months

    Number of participants (adults) with IREs were reported. The following list of neuroinflammatory disorders are categorized as IREs: Cranial nerve disorders, including paralyses/paresis, optic neuritis, multiple sclerosis, transverse myelitis, guillain-Barré syndrome, acute disseminated encephalomyelitis, including site specific variants, myasthenia gravis and Lambert-Eaton myasthenic syndrome, immune-mediated peripheral neuropathies and plexopathies, narcolepsy, isolated paresthesia of greater than (>) 7 days duration.

Secondary outcomes

  1. Stages 1 and 2: Geometric Mean Concentrations (GMCs) of Binding Antibody Levels Against Ebola Virus Glycoprotein (EBOV GP) Measured Using Enzyme-linked Immunosorbent Assay (ELISA)

    Time frame: 21 days post-dose 2 (Day 78)

    GMCs of antibodies binding to EBOV GP using ELISA were reported and were measured in ELISA units per milliliter (EU/mL). Serum samples were collected for analysis of binding antibodies against EBOV GP using ELISA to determine humoral responses following vaccination. For ELISA binding antibody responses, values below the lower limit of quantification (LLOQ) (36.11 ELISA units/mL).

Sponsors and collaborators

Lead sponsor

Janssen Vaccines & Prevention B.V.

Industry

Collaborators

  • Grameen Foundation
  • Institut National de la Santé Et de la Recherche Médicale, France
  • London School of Hygiene and Tropical Medicine
  • Ministry of Health and Sanitation, Sierra Leone
  • University of Oxford
  • University of Sierra Leone
  • World Vision, Ireland

Registry information

Official study title

A Staged Phase 3 Study, Including a Double-Blinded Controlled Stage to Evaluate the Safety and Immunogenicity of Ad26.ZEBOV and MVA-BN-Filo as Candidate Prophylactic Vaccines for Ebola

Acronym: EBOVAC-Salone

Important dates

Study start
2015
Primary completion
2019
Study completion
2019
First posted
Jul 28, 2015
Registry last updated
Jul 18, 2022

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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