A Study to Assess the Safety and Immunogenicity of the Malaria Vaccine, R21, Administered With and Without Matrix-M1
Condition: Malaria
MeSH terms: Malaria
Intervention: R21; Matrix-M1
Phase: Phase 1
Study type: Interventional
Primary purpose: Prevention
Allocation: Non-Randomized
Intervention model: Parallel Assignment
Masking: None (Open Label)
Enrollment: 31.0
Sex: All
Minimum age: 18 Years
Maximum age: 50 Years
Healthy volunteers: Accepts Healthy Volunteers

Summary:

      This is a clinical trial in which healthy volunteers will be administered one or two
      experimental malaria vaccines. The vaccine R21 will either be administered alone or in
      combination with the adjuvant vaccine Matrix-M1.

      All vaccinations will be administered intramuscularly. Each volunteer will receive three
      vaccinations in total.

      There are three different vaccine schedules:

      Group 1 will receive 10µg of R21 mixed with 50µg of Matrix-M1 on days 0, 28, and 56.

      Group 2 will receive 50µg of R21 on days 0, 28, and 56. .

      Group 3 will receive 50µg of R21 mixed with 50µg of Matrix-M1 on days 0, 28, and 56.

      The study will assess the safety of the vaccines, and the immune responses to the
      vaccinations. Immune responses are measured by tests on blood samples.

      Healthy adult volunteers will be recruited in Oxford and London, England.
    

Eligibility criteria:

        Inclusion Criteria:

        The volunteer must satisfy all the following criteria to be eligible for the study:

          -  Healthy adults aged 18 to 50 years

          -  Able and willing (in the Investigator's opinion) to comply with all study requirements

          -  Willing to allow the investigators to discuss the volunteer's medical history with
             their General Practitioner

          -  For females only, willingness to practice continuous effective contraception (see
             below) during the study and a negative pregnancy test on the day(s) of screening and
             vaccination

          -  Agreement to refrain from blood donation during the course of the study

          -  Provide written informed consent

        Exclusion Criteria:

        The volunteer may not enter the study if any of the following apply:

          -  Participation in another research study involving receipt of an investigational
             product in the 30 days preceding enrolment, or planned use during the study period

          -  Prior receipt of an investigational malaria vaccine or any other investigational
             vaccine likely to impact on interpretation of the trial data.

          -  Administration of immunoglobulins and/or any blood products within the three months
             preceding the planned administration of the vaccine candidate

          -  Any confirmed or suspected immunosuppressive or immunodeficient state, including HIV
             infection; asplenia; recurrent, severe infections and chronic (more than 14 days)
             immunosuppressant medication within the past 6 months (inhaled and topical steroids
             are allowed)

          -  History of allergic disease or reactions likely to be exacerbated by any component of
             the vaccine

          -  Any history of anaphylaxis in relation to vaccination

          -  Pregnancy, lactation or willingness/intention to become pregnant during the study

          -  History of cancer (except basal cell carcinoma of the skin and cervical carcinoma in
             situ)

          -  History of serious psychiatric condition likely to affect participation in the study

          -  Any other serious chronic illness requiring hospital specialist supervision

          -  Suspected or known current alcohol abuse as defined by an alcohol intake of greater
             than 42 units every week

          -  Suspected or known injecting drug abuse in the 5 years preceding enrolment

          -  Seropositive for hepatitis B surface antigen (HBsAg)

          -  Seropositive for hepatitis C virus (antibodies to HCV)

          -  History of clinical malaria (any species)

          -  Travel to a malaria endemic region during the study period or within the previous six
             months

          -  Any clinically significant abnormal finding on screening biochemistry or haematology
             blood tests or urinalysis

          -  Any other significant disease, disorder or finding which may significantly increase
             the risk to the volunteer because of participation in the study, affect the ability of
             the volunteer to participate in the study or impair interpretation of the study data

          -  Inability of the study team to contact the volunteer's GP to confirm medical history
             and safety to participate