A phase I/II study to determine efficacy, safety and immunogenicity of the candidate coronavirus disease (COVID-19) vaccine ChAdOx1 nCoV-19 in UK healthy adult volunteers

Phase 1

• Conditions: COVID-19 (SARS-CoV-2 infection); Infections and Infestations

• Registration Number: ISRCTN15281137
• Lead Sponsor: niversity of Oxford

Brief Summary

2020 Results article in https://pubmed.ncbi.nlm.nih.gov/32702298/ preliminary results (added 20/07/2020) 2021 Interim results article in https://doi.org/10.1016/S0140-6736(20)32661-1 interim results (added 09/12/2020) 2021 Results article in https://pubmed.ncbi.nlm.nih.gov/33617777/ results (added 23/02/2021) 2021 Interim results article in https://pubmed.ncbi.nlm.nih.gov/34480858/ Reactogenicity and immunogenicity after a late second dose or a third dose of ChAdOx1 nCoV-19 in the UK (added 06/09/2021)

Detailed Description

Not available

Study Timeline

• Study Start: 2020-04-06
• Last Update Posted: 6 May 2024
• Study Completion: 2024-12-31

Recruitment & Eligibility

• Status: Ongoing
• Sex: All
• Target Recruitment: 1077

Inclusion Criteria

Current inclusion criteria as of 22/04/2020:

1. Healthy adults aged 18-55 years
2. Able and willing (in the Investigator’s opinion) to comply with all study requirements (participants must not rely on public transport or taxis)
3. Willing to allow the investigators to discuss the volunteer’s medical history with their General Practitioner and access all medical records when relevant to study procedures
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

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Previous inclusion criteria:

1. Healthy adults aged 18 - 55 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 and access all medical records when relevant to study procedures
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

Current exclusion criteria as of 30/10/2020:

1. Prior receipt of any vaccines (licensed or investigational) =30 days before enrolment
2. Planned receipt of any vaccine other than the study intervention within 30 days before and after each study vaccination with the exception of the licensed seasonal influenza vaccination and the licensed pneumococcal vaccine. Participants will be encouraged to receive these vaccinations at least 7 days before or after their study vaccine.
3. Prior receipt of an investigational or licensed vaccine likely to impact on interpretation of the trial data (e.g. Adenovirus vectored vaccines, any coronavirus vaccines)
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 use of immunosuppressant medication within the past 6 months, except topical steroids or short-term oral steroids (course lasting <14 days)
6. Any autoimmune conditions, except mild psoriasis, well-controlled autoimmune thyroid disease, vitiligo or stable coeliac disease not requiring immunosuppressive or immunomodulatory therapy
7. History of allergic disease or reactions likely to be exacerbated by any component of the ChAdOx1 nCoV-19 or MenACWY vaccines.
8. Any history of angioedema
9. Any history of anaphylaxis
10. Pregnancy, lactation or willingness/intention to become pregnant during the study
11. History of cancer (except basal cell carcinoma of the skin and cervical carcinoma in situ)
12. History of serious psychiatric condition likely to affect participation in the study (e.g. ongoing severe depression, history of admission to an in-patient psychiatric facility, recent suicidal ideation, history of suicide attempt, bipolar disorder, personality disorder, alcohol and drug dependency, severe eating disorder, psychosis, use of mood stabilisers or antipsychotic medication)
13. Bleeding disorder (e.g. factor deficiency, coagulopathy or platelet disorder), or prior history of significant bleeding or bruising following IM injections or venepuncture
14. Any other serious chronic illness requiring hospital specialist supervision
15. Chronic respiratory diseases, including mild asthma (resolved childhood asthma is allowed)
16. Chronic cardiovascular disease (including hypertension), gastrointestinal disease, liver disease (except Gilberts Syndrome), renal disease, endocrine disorder (including diabetes) and neurological illness (excluding migraine)
17. Seriously overweight (BMI=40 kg/m²) or underweight (BMI=18 kg/m²)
18. Suspected or known current alcohol abuse as defined by an alcohol intake of greater than 42 units every week.
19. Suspected or known injecting drug abuse in the 5 years preceding enrolment.
20. Any clinically significant abnormal finding on screening biochemistry, haematology blood tests or urinalysis.
21. 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.
22. History of laboratory confirmed COVID-19.
23. New onset of fever or a cough or shortness of breath or anosmia/ageusia since February 2020. Should a reliable test become available, this exclusion criteria will be replaced with seroposi

Study & Design

• Study Type: Interventional
• Study Design: Not specified