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Purified vero rabies vaccine- serum free

Phase 3

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

Success Probability

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Trial Design

RandomizedDouble-BlindACTIVE_CONTROLLED
Total Trials1
Total Enrollment201

FDA Designations

No designations recorded

Clinical trial landscape

Purified vero rabies vaccine- serum free · 4 trials · 2 indications

Phase 3 1Phase 2 3
NCT04594551Study of Purified Vero Rabies Vaccine Compared With a Reference Rabies Vaccine as Simulated Rabies Post-Exposure Prophylaxis in Adults in ThaïlandRabies (Healthy Volunteers)
COMPLETED201 Analytics
PHASE3COMPLETED
Study of Purified Vero Rabies Vaccine Compared With a Reference Rabies Vaccine as Simulated Rabies Post-Exposure Prophylaxis in Adults in Thaïland
Rabies (Healthy Volunteers)Unlock trial analytics

Study Endpoints

Primary Endpoints

Percentage of participants 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 achieving RVNA titer greater than or equal to (≥) 0.5 IU/mL
Day 35 (post-vaccination)

RVNA titers will be measured by RFFIT

Number of Participants 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)
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

Number Subjects with rabies virus neutralizing antibody (RVNA) titer ≥ 0.5 IU/mL as measured by rapid fluorescent focus inhibition test (RFFIT)
Day 42

Rabies virus neutralizing antibody will be measured by rapid fluorescent focus inhibition test (RFFIT)

Number of participants with rabies virus neutralizing antibody (RVNA) titer ≥ 0.5 IU/mL at Day 42 (14 days after the last vaccination of primary vaccination series).
Day 42 post-vaccination

Rabies virus neutralizing antibody titer will be determined by the rapid fluorescent focus inhibition test (RFFIT)

Antibody Persistence in terms of rabies virus neutralizing antibody titers at 6 months and 12 months after the first vaccination
6 and 12 months post-vaccination

Rabies virus neutralizing antibody titer will be determined by the rapid fluorescent focus inhibition test (RFFIT)

To provide information concerning the immunogenicity of Purified Vero Rabies Vaccine.
42 days post-primary series vaccination

Secondary Endpoints

Number of participants reporting immediate adverse events (AEs)
Within 30 minutes post-vaccination
Percentage of participants reporting solicited injection site and systemic reactions
Within 7 days post-vaccination
Number of participants reporting unsolicited injection site AEs
Within 28 days post-vaccination
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposePREVENTION

Treatment Arms

ArmTypeDescription
Group 1: VRVg-2 + HRIGEXPERIMENTALVRVg-2 4 injections: 2 at Day 0, 1 at Day 7, 1 at Day 21 \+ HRIG at D0
Group 2: Verorab + HRIGACTIVE_COMPARATORVerorab 4 injections: 2 at Day 0, 1 at Day 7, 1 at Day 21 \+ HRIG at D0
VRVg GroupEXPERIMENTALParticipants will receive receive 3 vaccinations of Purified Vero Rabies Vaccine Serum Free (VRVg)
Imovax® Rabies GroupACTIVE_COMPARATORParticipants will receive receive 3 vaccinations of Human Diploid Cell Vaccine (HDCV), Imovax® Rabies
Purified Vero Rabies Vaccine GroupEXPERIMENTALParticipants will receive the Purified Vero Rabies Vaccine (VRVg) Serum Free
Imovax® Rabies Vaccine GroupEXPERIMENTALParticipants will receive the Imovax® Rabies
Verorab GroupACTIVE_COMPARATOR -

Interventions

NameTypeDescription
Purified vero rabies vaccine - serum freeBIOLOGICALPharmaceutical form:freeze-dried - Route of administration: intramuscular
Purified inactivated rabies vaccineBIOLOGICALPharmaceutical form:freeze-dried - Route of administration: intramuscular
Human rabies immunoglobulinsBIOLOGICALPharmaceutical form:liquid/solution in 2 mL vials - Route of administration: intramuscular
Purified Vero Rabies Vaccine Serum Free (VRVg)BIOLOGICAL0.5 mL, Intramuscular (Day 0, Day 7 and Day 28).
Imovax® Rabies: Human Diploid Cell Vaccine (HDCV),BIOLOGICAL0.5 mL, Intramuscular (Day 0, Day 7 and Day 28).
Purified Vero Rabies Vaccine (VRVg) - Serum FreeBIOLOGICAL0.5 mL, Intramuscular
Imovax® Rabies: inactivated rabies vaccineBIOLOGICAL1.0 mL, Intramuscular
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersYes
Study Sites3

Inclusion criteria : * Aged ≥ 18 years on the day of inclusion * Able to attend all scheduled visits and to comply with all study procedures * Body Mass Index (BMI): 18.5 kg/m2 ≤ BMI ≤ 30 kg/m2s Exclusion criteria: * Subject is pregnant, or lactating, or of childbearing potential and not using an...

Countries:ThailandPhilippinesUnited StatesFrance
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Frequently asked questions about Purified vero rabies vaccine- serum free

What is Purified Vero Rabies Vaccine- Serum Free used for?

Purified Vero Rabies Vaccine- Serum Free is an investigational vaccine being studied for rabies prevention, including pre-exposure prophylaxis and simulated post-exposure prophylaxis in healthy volunteers. It is developed by Sanofi (SNY) and is currently in Phase 2 clinical development for infectious disease.

What does Purified Vero Rabies Vaccine- Serum Free target?

Purified Vero Rabies Vaccine- Serum Free is a monoclonal antibody modality vaccine designed to target rabies virus. It is being studied to elicit an immune response against rabies for prevention of the disease.

Who makes Purified Vero Rabies Vaccine- Serum Free?

Purified Vero Rabies Vaccine- Serum Free is developed by Sanofi, a biopharmaceutical company listed on the stock exchange under the ticker SNY. Sanofi is conducting clinical trials to evaluate the vaccine's safety and immunogenicity.

What phase is Purified Vero Rabies Vaccine- Serum Free in?

Purified Vero Rabies Vaccine- Serum Free is in Phase 2 clinical development. It is an investigational vaccine, not yet approved by regulatory authorities, and is being studied in healthy volunteers for rabies prevention.

What clinical trials is Purified Vero Rabies Vaccine- Serum Free in?

Purified Vero Rabies Vaccine- Serum Free has completed three Phase 2 trials: NCT00948272 in France (384 participants), NCT01784874 in the United States (408 participants), and NCT01930357 in the Philippines (342 participants). All trials were completed and evaluated the vaccine against reference rabies vaccines.

Is Purified Vero Rabies Vaccine- Serum Free the same as other rabies vaccines?

Purified Vero Rabies Vaccine- Serum Free is being compared to reference rabies vaccines in clinical trials, including a purified Vero rabies vaccine and human diploid cell vaccines. It is a distinct vaccine candidate developed by Sanofi, not the same as those comparators.