A Study to Evaluate the Safety and Immunogenicity of a Candidate Ebola Vaccine in Adults
Condition: Virus Diseases
MeSH terms: Virus Diseases
Intervention: GlaxoSmithKline (GSK) Biologicals' investigational recombinant chimpanzee adenovirus Type 3-vectored Ebola Zaire vaccine (ChAd3-EBO-Z) (GSK3390107A); Placebo
Intervention description: A single dose administrated intramuscular; A single dose administrated intramuscular
Phase: Phase 2
Study type: Interventional
Primary purpose: Prevention
Allocation: Randomized
Intervention model: Parallel Assignment
Masking: Triple (Participant, Care Provider, Outcomes Assessor)
Enrollment: 3024.0
Sex: All
Minimum age: 18 Years
Healthy volunteers: Accepts Healthy Volunteers
Keywords: Protection against Ebola Zaire virus

Summary:

      The purpose of this study is to assess the safety and immunogenicity of the investigational
      ChAd3-EBO-Z vaccine administered to approximately 3 000 adults in Africa as a single IM dose
      Considering the risk of exposure to Ebola and the potential (based on animal data) for the
      investigational ChAd3-EBO-Z vaccine to afford at least partial protection, all subjects in
      the study will receive the investigational ChAd3-EBO-Z vaccine. The subjects in the Group
      EBO-Z will receive the vaccine at Day 0 of the study, whereas the subjects in the Group
      Placebo/ EBO-Z will receive a placebo at Day 0 (as a control) and will receive the
      investigational ChAd3-EBO-Z vaccine at Month 6, provided that no safety concerns are raised.
      In addition, vaccinating all subjects in the study with the investigational ChAd3 EBO Z
      vaccine will allow an increase of the safety database of the investigational vaccine. In case
      the geographic range of Ebola virus Zaire (EBOV) transmission expands to encompass any of the
      regions where this trial is conducted, earlier administration of the investigational
      ChAd3-EBO-Z vaccine to the subjects in the Group Placebo/ EBO-Z will be considered in that
      region.
    

Eligibility criteria:

        Inclusion Criteria:

          -  Subjects who, in the opinion of the Investigator, can and will comply with the
             requirements of the protocol (e.g. capability of or availability for Diary Card
             completion, return for follow-up visits, availability for clinical follow-up
             throughout the study period).

          -  Written/ thumb printed informed consent obtained from the subject prior to performing
             any study specific procedure or written/ thumb printed informed consent obtained from
             the subject's parent(s)/ legally acceptable representative(s) (LAR[s]) and written/
             thumb printed informed assent obtained from the subject, for minor subjects. This will
             only be applicable for countries where the legal age of majority is ≥ 21 years.

          -  A male or female aged 18 years of age or older at the time of Screening.

          -  Healthy subjects as per Investigator judgement, as established by medical history,
             clinical examination and haematology/ biochemistry laboratory parameters screening
             before entering into the study.

          -  Female subjects of non-childbearing potential may be enrolled in the study.

          -  Non-childbearing potential is defined as pre-menarche, current tubal ligation,
             hysterectomy, ovariectomy or post-menopause.

          -  Female subjects of childbearing potential may be enrolled in the study, if the
             subject:

          -  has practiced adequate contraception for 30 days prior to the Day 0 visit, and

          -  has a negative pregnancy test at the Day 0 visit, and

          -  has agreed to continue adequate contraception until 30 days after the Month 6 visit.

        Exclusion Criteria:

          -  Use of any investigational or non-registered product (drug or vaccine) other than the
             study vaccine during the period starting 30 days before the Day 0 visit, or planned
             use during the study period.

          -  Previous vaccination with an investigational EBOV or Marburg vaccine, or previous
             vaccination with a chimpanzee adenoviral vectored investigational vaccine.

          -  Known prior EBOV or SUDV disease.

          -  Travel to a country affected by the EBOV epidemic or direct contact with a person with
             EVD within 21 days prior to the Day 0 visit.

          -  History of any reaction or hypersensitivity (such as anaphylaxis, urticaria [hives],
             respiratory difficulty, angioedema, or abdominal pain) likely to be exacerbated by any
             component of the study vaccine.

          -  Planned administration/ administration of a vaccine not foreseen by the study protocol
             in the period starting 30 days before and ending 30 days after each vaccination visit.

          -  Serious acute or chronic illness determined by medical history and clinical
             examination including, but not limited to:

               -  Clinically significant immunosuppressive or immunodeficient condition (e.g.
                  clinical acquired immune deficiency syndrome [AIDS]).

               -  Any clinically significant haematological (CBC, including differential count and
                  platelet count) or biochemical (ALT, creatinine) laboratory abnormality.

               -  Any chronic illness with recent signs of exacerbation, or imposing a change in
                  the chronic treatment regimen, within 3 months prior to the Day 0 visit.

               -  Any unstable chronic medical condition (e.g. uncontrolled asthma).

          -  Pregnant female.