search
Back to results

Study of Purified Vero Rabies Vaccine Compared With Two Reference Rabies Vaccines in a Simulated Post-Exposure Regimen in Adults

Primary Purpose

Rabies (Healthy Volunteers)

Status
Completed
Phase
Phase 3
Locations
France
Study Type
Interventional
Intervention
VRVg-2
Purified Inactivated Rabies Vaccine
Human Diploid Cell Vaccine (HDCV)
Rabies immune globulin (human)
Sponsored by
Sanofi Pasteur, a Sanofi Company
About
Eligibility
Locations
Arms
Outcomes
Full info

About this trial

This is an interventional prevention trial for Rabies (Healthy Volunteers)

Eligibility Criteria

18 Years - undefined (Adult, Older Adult)All SexesAccepts Healthy Volunteers

Inclusion criteria :

  • Men or women aged >=18 years on the day of inclusion (>= 18 years means from the day of the 18th birthday onwards, with no upper age limit).
  • Able to attend all scheduled visits and to comply with all trial procedures.
  • Body Mass Index (BMI): 18.5 kilograms per square meter (kg/m^2) less than or equal to (<=) BMI <=30 kg/m^2.

Exclusion criteria:

  • 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 at least 4 weeks after the last vaccination. To be considered of non-childbearing potential, a female must be post-menopausal for at least 1 year, or surgically sterile.
  • Participation at the time of study enrollment or, planned participation during the present trial period in another clinical trial investigating a vaccine, drug, medical device, or medical procedure.
  • Receipt of any vaccine in the 4 weeks (28 days) preceding the first trial vaccination or planned receipt of any vaccine prior to Visit 7.
  • Previous vaccination against rabies (in pre- or post-exposure regimen) with either the trial vaccines or another vaccine.
  • 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 trial (veterinarians and their staff, animal handlers, rabies researchers, and certain laboratory workers, persons whose activities bring them into frequent contact with rabies virus or potentially rabid bats, raccoons, skunks, cats, dogs, or other species at risk for having rabies, people travelling where rabies was enzootic).
  • Known systemic hypersensitivity to any of the vaccine or HRIG components, or history of a life-threatening reaction to the vaccines used in the trial or to a vaccine containing any of the same substances.
  • Self-reported thrombocytopenia, contraindicating IM vaccination.
  • Bleeding disorder, or receipt of anticoagulants in the 3 weeks preceding inclusion, contraindicating IM vaccination.
  • Current alcohol or substance abuse that, in the opinion of the investigator, might interfere with the trial conduct of completion.
  • Chronic illness that, in the opinion of the investigator, was at a stage where it might interfere with trial conduct or completion.
  • Moderate or severe acute illness/infection (according to investigator judgment) on the day of vaccination or febrile illness (temperature >=38.0 degree Celsius). A prospective participant should not be included in the study until the condition had resolved or the febrile event had 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.

The above information was not intended to contain all considerations relevant to a participant's potential participation in a clinical trial.

Sites / Locations

  • Investigational Site Number 2500002
  • Investigational Site Number 2500001

Arms of the Study

Arm 1

Arm 2

Arm 3

Arm 4

Arm Type

Experimental

Active Comparator

Active Comparator

Experimental

Arm Label

Group 1: VRVg-2 + HRIG

Group 2: Verorab + HRIG

Group 3: Imovax Rabies + HRIG

Group 4: VRVg-2

Arm Description

Participants received 0.5 milliliters (mL) intramuscular (IM) injection of VRVg-2 formulation on Days 0, 3, 7, 14 and 28 along with HRIG injection at Day 0.

Participants received 0.5 mL IM injection of Verorab on Days 0, 3, 7, 14 and 28 along with HRIG injection at Day 0.

Participants received 1 mL IM injection of Imovax Rabies on Days 0, 3, 7, 14 and 28 along with HRIG injection at Day 0.

Participants received 0.5 mL IM injection of VRVg-2 formulation on Days 0, 3, 7, 14 and 28.

Outcomes

Primary Outcome Measures

Percentage of Participants With Rabies Virus Neutralizing Antibody (RVNA) Titers Greater Than or Equal to (>=) 0.5 International Units Per Milliliter (IU/mL)-Non-Inferiority Analysis
RVNA titer against rabies virus was assessed using the Rapid Fluorescent Focus Inhibition test (RFFIT) assay method.

Secondary Outcome Measures

Percentage of Participants With Rabies Virus Neutralizing Antibody Titers >=0.5 IU/mL
RVNA titer against rabies virus was assessed using the RFFIT assay method. Immune response of VRVg-2 was considered sufficient if the lower limit of the 95% CI for percentage of participants in Group 1 with RVNA titers >=0.5 IU/mL was not less than 95% at Day 28, when the primary non-inferiority objective was achieved at Day 28.
Percentage of Participants With Rabies Virus Neutralizing Antibody Titers >=0.2 IU/mL (Lower Limit of Quantification [LLOQ])
RVNA titer against rabies virus was assessed using the RFFIT assay method. Lower limit of quantitation (LLOQ) for the RFFIT assay was 0.2 IU/mL.
Rabies Virus Neutralizing Antibody (RVNA) Geometric Mean Titers (GMTs) Against Rabies Virus
RVNA GMT against rabies virus was assessed using the RFFIT assay method.
Geometric Mean Titer Ratio (GMTR) of Rabies Virus Neutralizing Antibody Titers
RVNA titer against rabies virus was assessed using the RFFIT assay method. GMTRs were calculated as the ratio of GMTs post vaccination (i.e., on Day 14, 28 and Day 42) and pre-vaccination on Day 0.
Percentage of Participants With Determined Complete and Determined Incomplete Virus Neutralization
Virus neutralization was defined as complete (absence of fluorescent cells) and incomplete (presence of fluorescent cells) at the participant/timepoint level at the starting dilution (1/5) of RFFIT assay. Percentage of participants with determined complete and determined incomplete virus neutralization were reported.
Number of Participants With Immediate Unsolicited Adverse Events (AEs)
An AE was defined as any untoward medical occurrence in a participant who received study vaccine and does not necessary had to have a causal relationship with treatment. An unsolicited AE was an observed AE that did not fulfill the conditions prelisted in the case report book (CRB) in terms of diagnosis and/or onset post-vaccination. All participants were observed for 30 minutes after any vaccination, and any unsolicited AEs occurred during that time were recorded as immediate unsolicited AEs in the CRB. Immediate AEs considered as related to vaccination were recorded as immediate unsolicited adverse reactions (ARs).
Number of Participants With Solicited Injection Site Reactions
A solicited reaction (SR) was an expected AR observed and reported under conditions (nature and onset) prelisted (i.e., solicited) in the protocol and CRB and considered as related to vaccination. An AR was all noxious and unintended responses to a medicinal product related to any dose. Solicited injection site reactions included pain, erythema and swelling at and around the injection site.
Number of Participants With Solicited Systemic Reactions
SR was an expected AR observed and reported under conditions (nature and onset) prelisted (i.e., solicited) in the protocol and CRB and considered as related to vaccination. An AR was all noxious and unintended responses to a medicinal product related to any dose. Solicited systemic reactions included fever, headache, malaise and myalgia.
Number of Participants With Unsolicited Adverse Events
An AE was defined as any untoward medical occurrence in a participant who received study vaccine and does not necessary had to have a causal relationship with treatment. An unsolicited AE was an observed AE that did not fulfill the conditions prelisted in the CRB in terms of diagnosis and/or onset post-vaccination.
Number of Participants With Serious Adverse Events (SAEs) and Adverse Events of Special Interest (AESIs)
An AE was defined as any untoward medical occurrence in a participant who received study vaccine and does not necessary had to have a causal relationship with treatment. An SAE was any untoward medical occurrence that at any dose resulted in death, life-threatening, initial or prolonged inpatient hospitalization, persistent or significant disability/incapacity, congenital anomaly/birth defect or a medically important event. An AESI was defined as one of scientific and medical concern specific to the Sponsor's product or program, for which ongoing monitoring and rapid communication by the Investigator to the Sponsor was appropriate. All SAEs and AESIs occurring during the study that were related to the product administered were reported by the Investigator to the Independent Ethics Committee/Institutional Review Board. Relatedness to study vaccine was based on Investigator's discretion.

Full Information

First Posted
May 24, 2019
Last Updated
June 28, 2022
Sponsor
Sanofi Pasteur, a Sanofi Company
search

1. Study Identification

Unique Protocol Identification Number
NCT03965962
Brief Title
Study of Purified Vero Rabies Vaccine Compared With Two Reference Rabies Vaccines in a Simulated Post-Exposure Regimen in Adults
Official Title
Immunogenicity and Safety of a Purified Vero Rabies Vaccine - Serum Free in Comparison With Verorab® and Imovax® Rabies, in a Simulated Rabies Post-exposure Regimen in Healthy Adults in France
Study Type
Interventional

2. Study Status

Record Verification Date
June 2022
Overall Recruitment Status
Completed
Study Start Date
July 1, 2019 (Actual)
Primary Completion Date
December 22, 2020 (Actual)
Study Completion Date
July 1, 2021 (Actual)

3. Sponsor/Collaborators

Responsible Party, by Official Title
Sponsor
Name of the Sponsor
Sanofi Pasteur, a Sanofi Company

4. Oversight

Studies a U.S. FDA-regulated Drug Product
Yes
Studies a U.S. FDA-regulated Device Product
No
Product Manufactured in and Exported from the U.S.
No
Data Monitoring Committee
No

5. Study Description

Brief Summary
Primary Objective: To demonstrate that Purified Vero Rabies Vaccine - Serum Free Vaccine generation 2 (VRVg-2) was non-inferior to Verorab and Imovax Rabies vaccines when co-administered with human rabies immunoglobulin (HRIG), in terms of proportion of participants achieving a rabies virus neutralizing antibody (RVNA) titer greater than or equal to (>=) 0.5 international units per milliliter (IU/mL) at Day 28, i.e., 14 days after the fourth vaccine injection. Secondary Objective: To describe the safety profile of VRVg-2 versus Verorab and Imovax Rabies vaccines when co-administered with HRIG, as well as that of VRVg-2, after each vaccine injection. To demonstrate that the proportion of participants in the VRVg-2 + HRIG group achieving an RVNA titer >= 0.5 IU/mL at Day 28 was at least 95 percent (%). To describe the immune response induced by VRVg-2 versus Verorab and Imovax Rabies vaccines when co-administered with HRIG, as well as that induced by VRVg-2, at Day 14 (7 days after the third injection), at Day 28 (14 days after the fourth injection) and at Day 42 (14 days after the last injection).
Detailed Description
Study duration per participant was approximately 7 months including: 1 day of screening and vaccination, a total of 5 vaccine injections over a 28-day period, 1 safety-follow up visit at Day 42, 1 safety follow-up/end of study visit at Day 56 and a 6-month safety follow-up call after last vaccine administration.

6. Conditions and Keywords

Primary Disease or Condition Being Studied in the Trial, or the Focus of the Study
Rabies (Healthy Volunteers)

7. Study Design

Primary Purpose
Prevention
Study Phase
Phase 3
Interventional Study Model
Parallel Assignment
Model Description
The study was divided into 4 groups: groups 1 to 3 (VRVg-2 + HRIG; Verorab + HRIG; Imovax Rabies + HRIG) were modified double-blind and group 4 (VRVg-2 standalone) was open-label.
Masking
ParticipantCare ProviderInvestigatorOutcomes Assessor
Masking Description
Modified double-blind: the participant (or legally acceptable representative) and the Investigator remain unaware of the treatment assignments throughout the study. An unblinded qualified trial staff member administered the appropriate vaccine but was not involved in the immunogenicity and safety evaluations.
Allocation
Randomized
Enrollment
640 (Actual)

8. Arms, Groups, and Interventions

Arm Title
Group 1: VRVg-2 + HRIG
Arm Type
Experimental
Arm Description
Participants received 0.5 milliliters (mL) intramuscular (IM) injection of VRVg-2 formulation on Days 0, 3, 7, 14 and 28 along with HRIG injection at Day 0.
Arm Title
Group 2: Verorab + HRIG
Arm Type
Active Comparator
Arm Description
Participants received 0.5 mL IM injection of Verorab on Days 0, 3, 7, 14 and 28 along with HRIG injection at Day 0.
Arm Title
Group 3: Imovax Rabies + HRIG
Arm Type
Active Comparator
Arm Description
Participants received 1 mL IM injection of Imovax Rabies on Days 0, 3, 7, 14 and 28 along with HRIG injection at Day 0.
Arm Title
Group 4: VRVg-2
Arm Type
Experimental
Arm Description
Participants received 0.5 mL IM injection of VRVg-2 formulation on Days 0, 3, 7, 14 and 28.
Intervention Type
Biological
Intervention Name(s)
VRVg-2
Intervention Description
Pharmaceutical form: Powder and solvent for suspension for injection; Route of administration: IM
Intervention Type
Biological
Intervention Name(s)
Purified Inactivated Rabies Vaccine
Other Intervention Name(s)
Verorab®
Intervention Description
Pharmaceutical form: Powder and solvent for suspension for injection; Route of administration: IM
Intervention Type
Biological
Intervention Name(s)
Human Diploid Cell Vaccine (HDCV)
Other Intervention Name(s)
IMOVAX® Rabies
Intervention Description
Pharmaceutical form: Powder and solvent for suspension for injection; Route of administration: IM
Intervention Type
Biological
Intervention Name(s)
Rabies immune globulin (human)
Other Intervention Name(s)
IMOGAM® Rabies-HT
Intervention Description
Pharmaceutical form: Solution for injection; Route of administration: IM
Primary Outcome Measure Information:
Title
Percentage of Participants With Rabies Virus Neutralizing Antibody (RVNA) Titers Greater Than or Equal to (>=) 0.5 International Units Per Milliliter (IU/mL)-Non-Inferiority Analysis
Description
RVNA titer against rabies virus was assessed using the Rapid Fluorescent Focus Inhibition test (RFFIT) assay method.
Time Frame
Day 28
Secondary Outcome Measure Information:
Title
Percentage of Participants With Rabies Virus Neutralizing Antibody Titers >=0.5 IU/mL
Description
RVNA titer against rabies virus was assessed using the RFFIT assay method. Immune response of VRVg-2 was considered sufficient if the lower limit of the 95% CI for percentage of participants in Group 1 with RVNA titers >=0.5 IU/mL was not less than 95% at Day 28, when the primary non-inferiority objective was achieved at Day 28.
Time Frame
Day 0 (pre-vaccination), Day 14, Day 28 and Day 42
Title
Percentage of Participants With Rabies Virus Neutralizing Antibody Titers >=0.2 IU/mL (Lower Limit of Quantification [LLOQ])
Description
RVNA titer against rabies virus was assessed using the RFFIT assay method. Lower limit of quantitation (LLOQ) for the RFFIT assay was 0.2 IU/mL.
Time Frame
Day 0 (pre-vaccination), Day 14, Day 28 and Day 42
Title
Rabies Virus Neutralizing Antibody (RVNA) Geometric Mean Titers (GMTs) Against Rabies Virus
Description
RVNA GMT against rabies virus was assessed using the RFFIT assay method.
Time Frame
Day 0 (pre-vaccination), Day 14, Day 28 and Day 42
Title
Geometric Mean Titer Ratio (GMTR) of Rabies Virus Neutralizing Antibody Titers
Description
RVNA titer against rabies virus was assessed using the RFFIT assay method. GMTRs were calculated as the ratio of GMTs post vaccination (i.e., on Day 14, 28 and Day 42) and pre-vaccination on Day 0.
Time Frame
Day 0 (pre-vaccination), Day 14, Day 28 and Day 42
Title
Percentage of Participants With Determined Complete and Determined Incomplete Virus Neutralization
Description
Virus neutralization was defined as complete (absence of fluorescent cells) and incomplete (presence of fluorescent cells) at the participant/timepoint level at the starting dilution (1/5) of RFFIT assay. Percentage of participants with determined complete and determined incomplete virus neutralization were reported.
Time Frame
Day 0 (pre-vaccination), Day 14, Day 28 and Day 42
Title
Number of Participants With Immediate Unsolicited Adverse Events (AEs)
Description
An AE was defined as any untoward medical occurrence in a participant who received study vaccine and does not necessary had to have a causal relationship with treatment. An unsolicited AE was an observed AE that did not fulfill the conditions prelisted in the case report book (CRB) in terms of diagnosis and/or onset post-vaccination. All participants were observed for 30 minutes after any vaccination, and any unsolicited AEs occurred during that time were recorded as immediate unsolicited AEs in the CRB. Immediate AEs considered as related to vaccination were recorded as immediate unsolicited adverse reactions (ARs).
Time Frame
Within 30 minutes after any and each vaccination (Vaccination 1, 2, 3, 4 and 5)
Title
Number of Participants With Solicited Injection Site Reactions
Description
A solicited reaction (SR) was an expected AR observed and reported under conditions (nature and onset) prelisted (i.e., solicited) in the protocol and CRB and considered as related to vaccination. An AR was all noxious and unintended responses to a medicinal product related to any dose. Solicited injection site reactions included pain, erythema and swelling at and around the injection site.
Time Frame
Within 7 days after any and each vaccination (Vaccination 1, 2, 3, 4 and 5)
Title
Number of Participants With Solicited Systemic Reactions
Description
SR was an expected AR observed and reported under conditions (nature and onset) prelisted (i.e., solicited) in the protocol and CRB and considered as related to vaccination. An AR was all noxious and unintended responses to a medicinal product related to any dose. Solicited systemic reactions included fever, headache, malaise and myalgia.
Time Frame
Up to 7 days after any and each vaccination (Vaccination 1, 2, 3, 4 and 5)
Title
Number of Participants With Unsolicited Adverse Events
Description
An AE was defined as any untoward medical occurrence in a participant who received study vaccine and does not necessary had to have a causal relationship with treatment. An unsolicited AE was an observed AE that did not fulfill the conditions prelisted in the CRB in terms of diagnosis and/or onset post-vaccination.
Time Frame
Up to 28 days after any and each vaccination (Vaccination 1, 2, 3, 4 and 5)
Title
Number of Participants With Serious Adverse Events (SAEs) and Adverse Events of Special Interest (AESIs)
Description
An AE was defined as any untoward medical occurrence in a participant who received study vaccine and does not necessary had to have a causal relationship with treatment. An SAE was any untoward medical occurrence that at any dose resulted in death, life-threatening, initial or prolonged inpatient hospitalization, persistent or significant disability/incapacity, congenital anomaly/birth defect or a medically important event. An AESI was defined as one of scientific and medical concern specific to the Sponsor's product or program, for which ongoing monitoring and rapid communication by the Investigator to the Sponsor was appropriate. All SAEs and AESIs occurring during the study that were related to the product administered were reported by the Investigator to the Independent Ethics Committee/Institutional Review Board. Relatedness to study vaccine was based on Investigator's discretion.
Time Frame
From Baseline (Day 0) up to 6 months after last vaccination (i.e., up to Month 7)

10. Eligibility

Sex
All
Minimum Age & Unit of Time
18 Years
Accepts Healthy Volunteers
Accepts Healthy Volunteers
Eligibility Criteria
Inclusion criteria : Men or women aged >=18 years on the day of inclusion (>= 18 years means from the day of the 18th birthday onwards, with no upper age limit). Able to attend all scheduled visits and to comply with all trial procedures. Body Mass Index (BMI): 18.5 kilograms per square meter (kg/m^2) less than or equal to (<=) BMI <=30 kg/m^2. Exclusion criteria: 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 at least 4 weeks after the last vaccination. To be considered of non-childbearing potential, a female must be post-menopausal for at least 1 year, or surgically sterile. Participation at the time of study enrollment or, planned participation during the present trial period in another clinical trial investigating a vaccine, drug, medical device, or medical procedure. Receipt of any vaccine in the 4 weeks (28 days) preceding the first trial vaccination or planned receipt of any vaccine prior to Visit 7. Previous vaccination against rabies (in pre- or post-exposure regimen) with either the trial vaccines or another vaccine. 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 trial (veterinarians and their staff, animal handlers, rabies researchers, and certain laboratory workers, persons whose activities bring them into frequent contact with rabies virus or potentially rabid bats, raccoons, skunks, cats, dogs, or other species at risk for having rabies, people travelling where rabies was enzootic). Known systemic hypersensitivity to any of the vaccine or HRIG components, or history of a life-threatening reaction to the vaccines used in the trial or to a vaccine containing any of the same substances. Self-reported thrombocytopenia, contraindicating IM vaccination. Bleeding disorder, or receipt of anticoagulants in the 3 weeks preceding inclusion, contraindicating IM vaccination. Current alcohol or substance abuse that, in the opinion of the investigator, might interfere with the trial conduct of completion. Chronic illness that, in the opinion of the investigator, was at a stage where it might interfere with trial conduct or completion. Moderate or severe acute illness/infection (according to investigator judgment) on the day of vaccination or febrile illness (temperature >=38.0 degree Celsius). A prospective participant should not be included in the study until the condition had resolved or the febrile event had 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. The above information was not intended to contain all considerations relevant to a participant's potential participation in a clinical trial.
Overall Study Officials:
First Name & Middle Initial & Last Name & Degree
Clinical Sciences & Operations
Organizational Affiliation
Sanofi Pasteur, a Sanofi Company
Official's Role
Study Director
Facility Information:
Facility Name
Investigational Site Number 2500002
City
Gieres
ZIP/Postal Code
38610
Country
France
Facility Name
Investigational Site Number 2500001
City
Rennes Cedex
ZIP/Postal Code
35000
Country
France

12. IPD Sharing Statement

Plan to Share IPD
Yes
IPD Sharing Plan Description
Qualified researchers may request access to patient level data and related study documents including the clinical study report, study protocol with any amendments, blank case report form, statistical analysis plan, and dataset specifications. Patient level data will be anonymized and study documents will be redacted to protect the privacy of trial participants. Further details on Sanofi's data sharing criteria, eligible studies, and process for requesting access can be found at: https://vivli.org

Learn more about this trial

Study of Purified Vero Rabies Vaccine Compared With Two Reference Rabies Vaccines in a Simulated Post-Exposure Regimen in Adults

We'll reach out to this number within 24 hrs