This is a Phase IIb randomised controlled trial of the safety, immunogenicity andefficacy of the malaria vaccine candidates R78C with Matrix-M™, and the combination ofRH5.1 and R21 with Matrix-M™, in children aged 5-36 months in Burkina Faso.
There will be three study groups, each comprising of 120 children aged between 5 and 36
months at the time of first vaccination living in a malaria endemic area and will be
recruited at one site in Burkina Faso. Participants will be randomised to receive either
three doses of the malaria candidate vaccines R78C/Matrix-M and three doses of a
commercially available rabies vaccine, three doses of RH5.1+R78C/Matrix-M and three doses
of R21/Matrix-M or six doses of commercially available control vaccines.
Follow up will be for six months following the last vaccination.
Biological: R21
A protein particle comprising recombinant HBsAg fused to the central repeat and the
C-terminus of the circumsporozoite protein
Biological: RH5.1
A soluble protein vaccine against the RH5 antigen
Biological: R78C
A soluble RIPR EGF-CyRPA fusion protein vaccine
Biological: Matrix-M™
A saponin-based vaccine adjuvant
Biological: Rabivax-S
Rabivax-S is an inactivated, freeze-dried, single-dose vaccine. The vaccine contains
purified, inactivated rabies antigen produced using Vero ATCC CCL 81 cells as the cell
substrate, Pitman Moore (PM3218) as the virus strain, and sucrose, glycine and HSA (Human
Serum Albumin) as excipients
Biological: Menveo
Menveo is a tetravalent meningitis vaccine that consists of one vial of MenA powder and
one vial of Men CWY solution.
Biological: Avaxim 80
Avaxim 80 is an inactivated, adsorbed hepatitis A vaccine. Each immunising dose contains
80 antigen units of inactivated hepatitis A virus (GBM strain).
Inclusion Criteria: Only participants who meet all the inclusion criteria will be
enrolled into the trial:
- Healthy infant aged 5-36 months at the time of first study vaccination
- Parent/guardian provides signed/thumb-printed informed consent
- Infant and parent/guardian resident in the study area villages and anticipated to be
available for vaccination and the duration of follow-up
Exclusion Criteria: The participant may not enter the trial if ANY of the following
apply:
- Clinically significant congenital abnormalities as judged by the PI or other
delegated individual.
- Clinically significant skin disorder (psoriasis, contact dermatitis etc.),
cardiovascular disease, respiratory disease, endocrine disorder, liver disease,
renal disease, gastrointestinal disease, neurological illness as judged by the PI or
other delegated individual.
- Weight-for-age Z score of less than -3 or other clinical signs of malnutrition.
- History of allergic reaction, significant IgE-mediated event, or anaphylaxis to
immunisation.
- History of allergic disease or reactions likely to be exacerbated by any component
of the vaccines.
- Sickle cell disease.
- Clinically significant laboratory abnormality at grade 2 or above as judged by the
PI or other delegated individual.
- Administration of immunoglobulins and/or any blood products within the three months
preceding the planned administration of the vaccine candidate.
- Receipt of any vaccine in the 14 days preceding enrolment, or planned receipt of any
other vaccine within 28 days following each study vaccination.
- History of vaccination with another malaria vaccine.
- Participation in another research study involving receipt of an investigational
product in the 30 days preceding enrolment, or planned use during the study period.
- Known maternal HIV infection (no testing will be done by the study team).
- 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 (for corticosteroids, this
will mean prednisone, or equivalent, ≥ 0.5 mg/kg/day; inhaled and topical steroids
are allowed).
- Any significant disease, disorder or situation which, in the opinion of the
Investigator, may either put the participants at risk because of participation in
the trial, or may influence the result of the trial, or the participant's ability to
participate in the trial.
The following adverse events associated with vaccine immunisation constitute absolute
contraindications to further administration of vaccine. If any of these events occur
during the study, the participant must be withdrawn and followed until resolution of the
event, as with any adverse event:
• Anaphylactic reaction following administration of vaccine.
The following adverse events constitute contraindications to administration of vaccine at
that point in time; if any one of these adverse events occurs at the time scheduled for
vaccination, the participant may be vaccinated at a later date, or withdrawn at the
discretion of the Investigator. The participant must be followed until resolution of the
event as with any adverse event:
- Acute disease at the time of vaccination (acute disease is defined as the presence
of a moderate or severe illness with or without fever or symptoms suggestive of
possible COVID-19 disease). All vaccines can be administered to persons with a minor
illness such as diarrhoea or mild upper respiratory infection without fever, i.e.
axillary temperature < 37.5°C.
- Temperature of >37.5°C (99.5°F) at the time of vaccination.
Institut de Recherche en Sciences de la Sante - Clinical Research Unit of Nanoro (IRSS-URCN)
Nanoro 2357560, Burkina Faso
Stephanie Pollock
+44 (0)1865611418
vaccinetrials@ndm.ox.ac.uk
Angela Minassian
angela.minassian@paediatrics.ox.ac.uk
Halidou Tinto, Principal Investigator
Institut de Recherche en Sciences de la Sante, Burkina Faso