New rabies vaccine could cut shots from three visits to one
NCT ID NCT07168018
First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This study tests a new experimental rabies vaccine (ChAdOx2 RabG) given together with the standard rabies vaccine in healthy adults aged 18-45. The goal is to see if this combination is safe and produces a strong immune response, potentially allowing a single visit instead of the usual three. Forty participants in a rabies-endemic country will be enrolled.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- ChAdOx2 RabG (experimental rabies vaccine) and inactivated rabies vaccine (Verorab)
- What this could lead to
- If successful, this could lead to a simpler, single-visit rabies vaccination schedule, improving access in endemic areas.
- What could go wrong
- This is an early phase II trial with only 40 participants, so results may not apply broadly. Safety and immune response are still being evaluated.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Phase 2
Tests whether the treatment actually works, and watches for side effects, in a larger group.
- Participants
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About 40 people
The number the study aims to enrol. It can still change while the study runs.
- Expected to start
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Dec 2025
An estimate. Start dates often move.
- Expected to finish
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Mar 2026
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 to 45 years
- Sex
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Anyone
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Healthy male or female adults aged 18-45 years at the time of enrolment with signed consent. * (Female only participants): Must be non-pregnant (as demonstrated by a negative serum pregnancy test) and willing to use an effective form of contraception. \*Female volunteers are required to use an effective form of contraception during the course of the study. There is currently no information about the effect of this vaccine on a foetus. Acceptable forms of contraception for female volunteers include: * Established use of injected or implanted hormonal methods of contraception. * Placement of an intrauterine device (IUD) or intrauterine system (IUS). * Total abdominal hysterectomy. * Planned long-term (at least 2 months from the date of the first vaccination) or permanent residence in Bagamoyo town. * Adults with a Body Mass Index (BMI) 18 to 30 Kg/m2 * Correctly answer all 10 questions on the protocol and study procedures understanding questionnaire within 2 attempts. Exclusion Criteria: * Clinically significant congenital abnormalities as judged by the PI or other delegated individual. * Clinically significant history of skin disorder, allergy, cardiovascular disease, respiratory disease, endocrine disorder, liver disease, renal disease, gastrointestinal disease and neurological illness 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 as judged by the PI or other delegated individual. * 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 cancer (except basal cell carcinoma of the skin and cervical carcinoma in situ). * History of allergic disease or reactions likely to be exacerbated by any component of the vaccines, including IRVs e.g. amphotericin B, chlortetracycline, neomycin, polymyxin, streptomycin * Any history of anaphylaxis in relation to vaccination. * Clinically significant laboratory abnormality as judged by the PI or other delegated individual. * Receipt of any previous rabies vaccinations, including an incomplete course of IRV and/or any doses of ChAdOx2 RabG. * History of vaccination with previous adenoviral vectored vaccines in the 6 months prior to enrolment in the study, or of vaccination with any other vaccine (including non-adenovirus-vectored COVID-19 vaccines) in the 28 days prior to enrolment. * Planned / likely receipt of any other vaccine within 28 days after enrolment. * History of bleeding disorder (e.g., factor deficiency, coagulopathy or platelet disorder), or prior history of significant bleeding or bruising following IM injections or venepuncture, or continuous anticoagulation e.g., with warfarin * History of confirmed major thrombotic event, (including cerebral venous sinus thrombosis, deep vein thrombosis, pulmonary embolism) or, * History of antiphospholipid syndrome. * History of prior receipt of unfractionated heparin * History of heparin induced thrombocytopenia * Receipt of any blood products/ immunoglobulins within the three months preceding the planned administration of the vaccine candidate. * Participation in another research study involving receipt of an investigational product in the 30 days preceding enrolment, or planned use during the study period. * Seropositive for hepatitis B surface antigen (HBsAg) or hepatitis C (HCV IgG). * Likelihood of travel away from the study area. * Female participant who is pregnant, lactating or planning pregnancy during the course of the trial. * Scheduled elective surgery or other procedures requiring general anaesthesia during the trial. * Any other 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. * Contraindication to use of paracetamol
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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Ifakara Health Institute
Bagamoyo, Tanzania
More trials for these conditions
Other studies related to the condition(s) this trial covers.
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- New rabies vaccine shows promise in large trial
- Could a tiny skin shot replace the big rabies needle?
- New rabies shot shows promise in preventing deadly infection after bites