A Study to Determine the Safety and Immunogenicity of a Candidate MAP Vaccines ChAdOx2 HAV and MVA in Healthy Adult Volunteers

Study Purpose

A phase I dose escalation study to assess the safety and immunogenicity of the candidate vaccines ChAdOx2 HAV and MVA HAV in healthy volunteers. Volunteers will be recruited and vaccinated in Oxford, England. All vaccinations will be administered intramuscularly. Three different doses of the ChAdOx2 HAV will be tested (5x10^9 vp, 2.5x10^10 vp and 5x10^10vp). MVA HAV will be assessed at 2 different doses (5x10^7 and 2x10^8 pfu) The total duration of the study will be 52 weeks from the day of enrolment for volunteers receiving ChAdOx2 HAV only, 12 weeks for volunteers receiving MVA HAV only and 20 weeks for volunteers receiving ChAdOx2 HAV and MVA HAV.

Recruitment Criteria

Healthy volunteers are participants who do not have a disease or condition, or related conditions or symptoms

Accepts Healthy Volunteers

An interventional clinical study is where participants are assigned to receive one or more interventions (or no intervention) so that researchers can evaluate the effects of the interventions on biomedical or health-related outcomes.

An observational clinical study is where participants identified as belonging to study groups are assessed for biomedical or health outcomes.

Searching Both is inclusive of interventional and observational studies.

Study Type
Eligible Ages 18 Years - 50 Years
Gender All
More Inclusion & Exclusion Criteria

Inclusion Criteria:

1. Healthy adults aged 18 to 50 years 2. Able and willing (in the Investigator's opinion) to comply with all study requirements 3. Willing to allow the investigators to discuss the volunteer's medical history with their General Practitioner 4. 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 5. Agreement to refrain from blood donation during the course of the study 6. Provide written informed consent

Exclusion Criteria:

1. Participation in another research study involving receipt of an investigational product in the 30 days preceding enrolment, or planned use during the study period 2. Prior receipt of an investigational vaccine likely to impact on interpretation of the trial data. 3. Prior receipt of an adenoviral vectored vaccine in the last 12 months 4. Administration of immunoglobulins and/or any blood products within the three months preceding the planned administration of the vaccine candidate 5. 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) 6. History of allergic disease or reactions likely to be exacerbated by any component of the vaccine 7. Any history of hereditary angioedema, acquired angioedema, or idiopathic angioedema. 8. Any history of anaphylaxis in relation to vaccination 9. Pregnancy, lactation or willingness/intention to become pregnant during the study 10. History of cancer (except basal cell carcinoma of the skin and cervical carcinoma in situ) 11. History of serious psychiatric condition likely to affect participation in the study 12. Bleeding disorder (eg. Factor deficiency, coagulopathy or platelet disorder), or prior history of significant bleeding or bruising following IM injections or venepuncture 13. Any other serious chronic illness requiring hospital specialist supervision 14. Suspected or known current alcohol abuse as defined by an alcohol intake of greater than 42 units every week 15. Suspected or known injecting drug abuse in the 5 years preceding enrolment 16. Seropositive for hepatitis C (antibodies to HCV) 17. Seropositive for hepatitis B surface antigen(HBsAg) 18. Any clinically significant abnormal finding on screening biochemistry or haematology blood tests or urinalysis 19. 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 20. Inability of the study team to contact the volunteer's GP to confirm medical history and safety to participate.

Trial Details

This trial id was obtained from ClinicalTrials.gov, a service of the U.S. National Institutes of Health, providing information on publicly and privately supported clinical studies of human participants with locations in all 50 States and in 196 countries.

Trial ID:

Phase 1: Studies that emphasize safety and how the drug is metabolized and excreted in humans.

Phase 2: Studies that gather preliminary data on effectiveness (whether the drug works in people who have a certain disease or condition) and additional safety data.

Phase 3: Studies that gather more information about safety and effectiveness by studying different populations and different dosages and by using the drug in combination with other drugs.

Phase 4: Studies occurring after FDA has approved a drug for marketing, efficacy, or optimal use.

Phase 1

The sponsor is the organization or person who oversees the clinical study and is responsible for analyzing the study data.

Lead Sponsor
University of Oxford

The person who is responsible for the scientific and technical direction of the entire clinical study.

Principal Investigator
Adrian V Hill, DPhill FRCP
Principal Investigator Affiliation Centre for Clinical Vaccinology and Tropical Medicine, Churchill Hosptal, Oxford, United Kingdom

Category of organization(s) involved as sponsor (and collaborator) supporting the trial.

Agency Class
Overall Status Recruiting
Countries United Kingdom

The disease, disorder, syndrome, illness, or injury that is being studied.

Crohn Disease, Mycobacterium Avium Subspecies Paratuberculosis
Additional Details

This is a phase I, open label, dose escalation trial to assess the safety and immunogenicity of the ChAdOx2 and MVA HAV vaccines against Mycobacterium avium subspecies paratuberculosis (MAP) in healthy volunteers There will be 5 study groups with a total of 28 volunteers. ChAdOx2 HAV will be administered intramuscularly as a single vaccination at 3 different doses: 5x10^9 vp (group 1), 2.5x10^10 (group 2) and 5x10^10 vp (group 3) and as a prime vaccine in group 6 (prime/boost group). MVA HAV will be administered intramuscularly as a single vaccination at 2 different doses: 5x10^7 pfu (group 4), 2x10^8 pfu (group 5) and as a boost vaccine in group 6 (prime/boost group) Vaccination of groups will be sequential from Group 1 to Group 6 with interim safety reviews prior to dose escalation Volunteers will be recruited and undergo screening visits, vaccination and clinic visits post-vaccination at the trial site. Blood samples for safety and immunology purposes will be performed on the visit time points indicated in the schedule of attendances. Safety will be assessed by the frequency, incidence and nature of adverse events and serious adverse events arising during the study.

Contact a Trial Team

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International Sites

Oxford, United Kingdom




Centre for Clinical Vaccinology and Tropical Medicine, Churchill Hospital

Oxford, ,

Site Contact

Adrian Hill, DPhil FRCP


01865 611424

Nearest Location

Site Contact

Adrian Hill, DPhil FRCP


01865 611424

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