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Purified vero rabies vaccine- serum free VRVg-2

Phase 3

Rabies (Healthy Volunteers) | Monoclonal antibody | Infectious Disease |Sanofi|Last Updated: Sep 19, 2025

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Trial Design

RandomizedDouble-BlindACTIVE_CONTROLLED
Total Trials1
Total Enrollment403

FDA Designations

No designations recorded

Clinical trial landscape

Purified vero rabies vaccine- serum free VRVg-2 · 1 trial · 1 indication

Phase 3 1
NCT04478084Study of Purified Vero Rabies Vaccine Compared With a Reference Rabies Vaccine as Simulated Rabies Post-Exposure Prophylaxis in Adult and Pediatric Population in ThaïlandRabies (Healthy Volunteers)
COMPLETED403 Analytics
PHASE3COMPLETED
Study of Purified Vero Rabies Vaccine Compared With a Reference Rabies Vaccine as Simulated Rabies Post-Exposure Prophylaxis in Adult and Pediatric Population in Thaïland
Rabies (Healthy Volunteers)Unlock trial analytics

Study Endpoints

Primary Endpoints

Percentage of participants in Group 1, Group 2, Group 5 and Group 6 achieving rabies virus neutralizing antibody (RVNA) titer greater than or equal to (≥) 0.5 IU/mL
Day 14 (post-vaccination)

RVNA titers will be measured by rapid fluorescent focus inhibition test (RFFIT)

Percentage of participants in Group 1, Group 2, Group 5 and Group 6 achieving RVNA titer greater than or equal to (≥) 0.5 IU/mL
Day 42 (post-vaccination)

RVNA titers will be measured by RFFIT

Number of Participants in Group 1, Group 2, Group 5 and Group 6 achieving RVNA titer greater than or equal to (≥) lower limit of quantification
Day 14 (post-vaccination)

RVNA titers will be measured by RFFIT Lower limit of quantification for RFFIT assay is 0.2 IU/mL

Geometric Mean Titer Ratio (GMTR) of individual RVNA titer: (post-/pre-vaccination) in Group 1, Group 2, Group 5 and Group 6 Participants
Day 14 (post-vaccination)

RVNA titers against rabies virus will be measured by RFFIT at Day 0 and Day 14 RVNA ratios Day14/Day0 will be calculated

Secondary Endpoints

Number of participants reporting immediate adverse events (AEs)
Within 30 minutes post-vaccination
Percentage of participants reporting solicited injection site reactions
Within 7 days post-vaccination
Percentage of participants reporting solicited systemic reactions
Between Day 0 and Day 3, between Day 3 and Day 7, and during the 7 days following the remaining vaccinations
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposePREVENTION

Treatment Arms

ArmTypeDescription
Group 1: pediatric participants; VRVg-2EXPERIMENTALVRVg-2 8 injections: 2 at Day 0, 2 at Day 3, 2 at Day 7, and 2 at Day 28
Group 2: pediatric participants; VerorabACTIVE_COMPARATORVerorab 8 injections: 2 at Day 0, 2 at Day 3, 2 at Day 7, and 2 at Day 28
Group 3: adult participants; VRVG-2 + ERIGEXPERIMENTALVRVg-2 8 injections: 2 at Day 0, 2 at Day 3 and 2 at Day 7 \+ ERIG at D0
Group 4: adult participants; Verorab + ERIGACTIVE_COMPARATORVerorab 8 injections: 2 at Day 0, 2 at Day 3 and 2 at Day 7 \+ ERIG at D0
Group 5: adult participants; VRVG-2 + HRIGEXPERIMENTALVRVg-2 8 injections: 2 at Day 0, 2 at Day 3, 2 at Day 7, and 2 at Day 28 \+ HRIG at D0
Group 6: adult participants; Verorab + HRIGACTIVE_COMPARATORVerorab 8 injections: 2 at Day 0, 2 at Day 3, 2 at Day 7, and 2 at Day 28 \+ HRIG at D0

Interventions

NameTypeDescription
Purified vero rabies vaccine - serum free VRVg-2BIOLOGICALPharmaceutical form:freeze-dried Route of administration: intradermal
Purified inactivated rabies vaccineBIOLOGICALPharmaceutical form:freeze-dried Route of administration: intradermal
Equine rabies immunoglobulins (ERIG) (only Group 3 and Group 4)BIOLOGICALPharmaceutical form: liquid/solution in 5 mL vials Route of administration: intramuscular
Human rabies immunoglobulins (HRIG) (only Group 5 and Group 6)BIOLOGICALPharmaceutical form: liquid/solution in 2 mL vials Route of administration: intramuscular
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Eligibility Criteria

Age Range1 Year to N/A
SexALL
Healthy VolunteersYes
Study Sites3

Inclusion Criteria: Inclusion criteria : * Aged ≥ 1 year on the day of inclusion * Participant (adult ≥ 18 years without upper age limit) or participant and participant's parent/LAR (child ≥ 1 to \< 18 years) are able to attend all scheduled visits and to comply with all study procedures The foll...

Countries:Thailand
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Frequently asked questions about Purified vero rabies vaccine- serum free VRVg-2

What is Purified vero rabies vaccine- serum free VRVg-2 used for?

Purified vero rabies vaccine- serum free VRVg-2 is an investigational vaccine being studied for the prevention of rabies. It is being evaluated in healthy volunteers and in the context of rabies post-exposure prophylaxis. The vaccine is developed by Sanofi and is currently in Phase 3 clinical development.

Who makes Purified vero rabies vaccine- serum free VRVg-2?

Purified vero rabies vaccine- serum free VRVg-2 is developed by Sanofi, a company listed on the stock exchange under the ticker SNY. Sanofi is conducting Phase 3 clinical trials to evaluate the vaccine's safety and immunogenicity in comparison with reference rabies vaccines.

What phase is Purified vero rabies vaccine- serum free VRVg-2 in?

Purified vero rabies vaccine- serum free VRVg-2 is in Phase 3 clinical development. It is an investigational vaccine and has not been approved by regulatory authorities. Two Phase 3 trials have been completed, with a total enrollment of over 2,000 participants.

What clinical trials is Purified vero rabies vaccine- serum free VRVg-2 in?

Purified vero rabies vaccine- serum free VRVg-2 has been studied in two completed Phase 3 trials. NCT04127786 compared the vaccine with two reference rabies vaccines in a pre-exposure regimen in children and adults, with a booster dose in a subset of adults. NCT04478084 evaluated the vaccine as simulated rabies post-exposure prophylaxis in adults and children in Thailand.

Is Purified vero rabies vaccine- serum free VRVg-2 the same as VRVg-2?

Yes, Purified vero rabies vaccine- serum free VRVg-2 is also known as VRVg-2. The vaccine is a purified vero cell rabies vaccine produced under serum-free conditions. It is being developed by Sanofi for the prevention of rabies.