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OpenTrials
Completed

NCT Number: NCT04594551

Study of Purified Vero Rabies Vaccine Compared With a Reference Rabies Vaccine as Simulated Rabies Post-Exposure Prophylaxis in Adults in Thaïland

Primary Objective:

To describe the immune response induced by VRVg-2 and Verorab vaccines at D14 and D35 when co-administered with Human Rabies Immunoglobulins (HRIG) at D0, according to the Zagreb (2-1-1) IM regimen in healthy adult subjects.

Secondary Objective:

Immunogenicity To describe the immune response induced by VRVg-2 and Verorab vaccines at D90 when co-administered with HRIG at D0, according to the Zagreb (2-1-1) IM regimen in healthy adult subjects.

Safety To describe the safety profile of VRVg-2 and Verorab vaccines when co administered with HRIG at D0, after each vaccination.

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Key information

Age range

18 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 3

Primary location

Investigational site number 7640001, Bangkok, Thailand

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About this study

The duration of each subject's participation in the study will be approximately 7 months (21 day-vaccination period followed by 6 months safety follow-up period).

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

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 effective method of contraception or abstinence from at least 4 weeks prior to the first vaccination and 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 7 (D90)
  • 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 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
  • Known systemic hypersensitivity to any of the study/control vaccine components or to human rabies immunoglobulin (HRIG), 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 (IM) vaccination
  • Bleeding disorder, or receipt of anticoagulants in the 3 weeks preceding inclusion, contraindicating IM 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 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 subject 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
  • Receipt of chloroquine or hydroxychloroquine up to 2 months prior to the study or through to study until Visit 7

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

Treatment and study plan

Purified Vero Rabies Vaccine - Serum Free

Biological

Pharmaceutical form:freeze-dried - Route of administration: intramuscular

Other names: VRVg-2

Purified inactivated rabies vaccine

Biological

Pharmaceutical form:freeze-dried - Route of administration: intramuscular

Other names: Verorab

Human rabies immunoglobulins

Biological

Pharmaceutical form:liquid/solution in 2 mL vials - Route of administration: intramuscular

Other names: HRIG

Primary outcomes

  1. Percentage of participants achieving rabies virus neutralizing antibody (RVNA) titer greater than or equal to (≥) 0.5 IU/mL

    Time frame: Day 14 (post-vaccination)

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

  2. Percentage of participants achieving RVNA titer greater than or equal to (≥) 0.5 IU/mL

    Time frame: Day 35 (post-vaccination)

    RVNA titers will be measured by RFFIT

  3. Number of Participants achieving RVNA titer greater than or equal to (≥) lower limit of quantification

    Time frame: Day 14 (post-vaccination)

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

  4. Number of Participants achieving RVNA titer greater than or equal to (≥) lower limit of quantification

    Time frame: Day 35 (post-vaccination)

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

  5. Geometric Mean Titer Ratio (GMTR) of individual RVNA titer: (post-/pre-vaccination)

    Time frame: 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

  6. Geometric Mean Titer Ratio (GMTR) of individual RVNA titer: (post-/pre-vaccination)

    Time frame: Day 35 (post-vaccination)

    RVNA titers against rabies virus will be measured by RFFIT at Day 0 and Day 35 - RVNA ratios Day35/Day0 will be calculated

Secondary outcomes

  1. Number of participants reporting immediate adverse events (AEs)

    Time frame: Within 30 minutes post-vaccination

    Unsolicited (spontaneously reported) systematic AEs

  2. Percentage of participants reporting solicited injection site and systemic reactions

    Time frame: Within 7 days post-vaccination

    Solicited injection site reactions:

    • pain, erythema, and swelling in adults (aged ≥ 18 years)

    Solicited systemic reactions:

    • fever, headache, malaise and myalgia in adults (aged ≥ 18 years)
  3. Number of participants reporting unsolicited injection site AEs

    Time frame: Within 28 days post-vaccination

    Unsolicited injection site AEs

  4. Number of participants reporting unsolicited systemic AEs

    Time frame: Between each vaccination and up to 28 days after the last vaccination

    Unsolicited systemic AEs

  5. Number of participants reporting serious adverse events (SAEs)

    Time frame: Up to 6 months after last vaccination

    SAEs, including adverse event of special interest (AESIs)

  6. Percentage of participants achieving rabies virus neutralizing antibody (RVNA) titer greater than or equal to (≥) 0.5 IU/mL

    Time frame: Day 90 (post-vaccination)

    RVNA titers will be measured by RFFIT

  7. Number of Participants achieving RVNA titer greater than or equal to (≥) lower limit of quantification

    Time frame: Day 90 (post-vaccination)

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

  8. Geometric Mean Titer Ratio (GMTR) of individual RVNA titer: (post-/pre-vaccination)

    Time frame: Day 90 (post-vaccination)

    RVNA titers against rabies virus will be measured by RFFIT at Day 0 and Day 90 - RVNA ratios Day90/Day0 will be calculated

Sponsors and collaborators

Lead sponsor

Sanofi Pasteur, a Sanofi Company

Industry

Registry information

Official study title

Immunogenicity and Safety of the Purified Vero Rabies Vaccine - Serum Free (VRVg) Using the Zagreb Regimen as Simulated Rabies Post-exposure Prophylaxis in Healthy Adults in Thailand

Important dates

Study start
2020
Primary completion
2021
Study completion
2021
First posted
Oct 20, 2020
Registry last updated
Sep 19, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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