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New rabies vaccine shows promise in large trial

NCT ID NCT04127786

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
Running, but no longer taking on new participants.
Completed This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Phase 3 trial tested a new rabies vaccine (VRVg-2) in 1708 healthy children and adults in Thailand. The goal was to see if it works as well as two existing rabies vaccines when given before exposure to the virus. Participants received a series of shots, and some got a booster dose later. The study is complete, and results will show if the new vaccine is a safe and effective option.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Purified vero rabies vaccine - serum free (VRVg-2)
What this could lead to
If successful, this could provide a safe and effective alternative rabies vaccine for pre-exposure prevention in both children and adults.
What could go wrong
This is a completed Phase 3 trial, but results are not yet published. The new vaccine must prove it is as good as existing ones, and rare side effects may still emerge.

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 3

Large-scale testing in a bigger group. Usually the last step before a treatment can be approved.

Participants

1,708 people

The number who actually took part.

Started

Oct 2019

Finished

Apr 2025

Lead sponsor

A company

The lead sponsor is a pharmaceutical, biotech, or medical-device company.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

1 year and older

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: * Aged ≥1 year on the day of inclusion * Cohort 1 - pediatrics (\>1 to 17 years old) and adult (≥18 years old) * Cohort 2 - all adults (≥18 years old) * Informed consent form has been signed and dated by the participant and /or and parent(s) or legally acceptable representative (LAR) and by an independent witness (if required by local regulations), as necessary; and assent form has been signed and dated by the participant, as required * Participant (adult ≥18 years) or participant and parent/LAR (1 year to \<18 years) are able to attend all scheduled visits and to comply with all study procedures. Exclusion Criteria: * Participant is pregnant, or lactating, or of childbearing potential and not using an effective method of contraception or abstinence from at least 4 weeks prior to the first vaccination until 1 month after each vaccination. To be considered of non-childbearing potential, a female must be pre-menarche or post-menopausal for at least 1 year, or surgically sterile. * Participation at the time of study enrollment or, planned participation during the present study period in another clinical study investigating a vaccine, drug, medical device, or medical procedure. * Receipt of any vaccine in the 4 weeks (28 days) preceding the first study vaccination or planned receipt of any vaccine prior to Visit 5 for pediatric participants and adult participants in Cohort 1, and prior to Visit 4 for adult participants in Cohort 2. * Previous vaccination against rabies (in pre- or post-exposure regimen) with either the study vaccines or another vaccine. * Bite by, or exposure to a potentially rabid animal in the previous 6 months with or without post-exposure prophylaxis. * Receipt of immune globulins, blood or blood-derived products in the past 3 months. * Known or suspected congenital or acquired immunodeficiency; or receipt of immunosuppressive therapy, such as anti-cancer chemotherapy or radiation therapy, within the preceding 6 months; or long-term systemic corticosteroid therapy (prednisone or equivalent for more than 2 consecutive weeks within the past 3 months). * At high risk for rabies exposure during the study. * Known systemic hypersensitivity to any of the study/control vaccine components, or history of a life-threatening reaction to the vaccines used in the study or to a vaccine containing any of the same substances. * Self-reported thrombocytopenia, contraindicating intramuscular vaccination. * Bleeding disorder, or receipt of anticoagulants in the 3 weeks preceding inclusion, contraindicating intramuscular vaccination. * Deprived of freedom by an administrative or court order, or in an emergency setting, or hospitalized involuntarily. * Current alcohol or substance abuse that, in the opinion of the investigator, might interfere with the study conduct or completion. * Chronic illness(1) that, in the opinion of the Investigator, is at a stage where it might interfere with study conduct or completion. * Moderate or severe acute illness/infection (according to Investigator judgment) on the day of vaccination or febrile illness (temperature ≥ 38.0°C). A prospective participant should not be included in the study until the condition has resolved or the febrile event has subsided. * Personal history of Guillain-Barré syndrome. * Identified as an Investigator or employee of the Investigator or study center with direct involvement in the proposed study, or identified as an immediate family member (ie, parent, spouse, natural or adopted child) of the Investigator or employee with direct involvement in the proposed study. 1. Chronic illness may include, but is not limited to, neurological, cardiopulmonary, gastrointestinal, renal, genitourinary, metabolic, hematologic, auto-immune, or psychiatric disorders or infection

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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

  • Investigational Site Number : 7640001

    Bangkok, 10330, Thailand

  • Investigational Site Number : 7640002

    Khon Kaen, 40002, Thailand

  • Investigational Site Number : 7640003

    Bangkok, 10700, Thailand

  • Investigational Site Number : 7640004

    Bangkok, 10400, Thailand

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