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One shot to stop rabies? new vaccine trial begins

NCT ID NCT04270838

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing This study
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study tests a new rabies vaccine called ChAdOx2 RabG, given as a single shot. It involves 174 healthy adults (18-45 years) and young children (2-6 years) in a country where rabies is common. The goal is to see if the vaccine is safe and triggers a strong immune response, comparing it to the standard multi-dose rabies vaccine.

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 (a viral-vector based rabies vaccine)
What this could lead to
If successful, this could lead to a single-dose rabies vaccine that is easier to administer than current multi-dose regimens, especially in remote areas.
What could go wrong
This is an early-phase trial (Phase 1/2) with only 174 participants, so safety and immune response are still being evaluated. The vaccine may not provide long-lasting protection or could have side effects not yet seen.

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

Phase 1/2

Runs two stages together: safety and dose first, then whether the treatment works.

Participants

174 people

The number who actually took part.

Started

Feb 2022

Expected to finish

Sep 2028

An estimate. End dates often move.

Lead sponsor

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

2 to 45 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show 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: * Adult groups: Healthy male or female adults aged 18-45 years at the time of enrolment with signed consent. * Adult groups (Female only participants): Must be non-pregnant (as demonstrated by a negative urine pregnancy test) and willing to use an effective form of contraception. Or if they agree to an extended period of follow-up of up to 5.5 years, use an effective form of contraception during the first year of enrolment in the study). * Paediatric groups: Healthy male or female young children aged 2-6 years at the time of enrolment with signed consent obtained from parents or guardians. * Paediatric groups: completion of the Expanded Programme on Immunisation (EPI) at least 6 months prior to study enrolment. * Planned long-term (at least 61 months from the date of the first vaccination) or permanent residence in Bagamoyo town. * Adults with a Body Mass Index (BMI) 18 to 35 Kg/m2; or young children with Z-score of weight-for-age within ±2SD. * 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). * Any condition which would place the individual at elevated risk of serious COVID-19 infection, or any other factor which may make the individual eligible for priority COVID-19 vaccination (i.e. ahead of others in their age group). * 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. * 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.

Contacts and locations

Locations

  • IHI Clinical Trial Facility

    Bagamoyo, Tanzania

More trials for these conditions

Other studies related to the condition(s) this trial covers.