The aim of the study is to document the safety and immunogenicity of Purified Vero Rabies Vaccine (VRVg) when given in a simulated post-exposure regimen, i.e. with co-administration of human rabies immunoglobulins (Imovax® Rabies). Primary Objectives: * To demonstrate that VRVg is non-inferior to Imovax® Rabies in terms of proportion of subjects achieving a rabies virus neutralizing antibody (RVNA) titer ≥ 0.5 international units (IU)/mL at Day 14. * To demonstrate that the observed proportion of subjects achieving an RVNA titer ≥ 0.5 IU/mL at Day 14 is at least 99%, with a lower limit of the 95% confidence interval (CI) of at least 97%. Secondary Objectives: * To assess the clinical safety of each vaccine after each vaccine injection when administered in a simulated post-exposure schedule. * To describe the geometric mean titer ratio (GMTR) between the 2 vaccine groups at Day 14.
All participants will receive five vaccine injections, i.e. one at Day 0, at Day 3, at Day 7, at Day 14 and at Day 28, respectively, (Essen regimen). In addition, human rabies immunoglobulins (HRIG) will be concomitantly administered to all subjects on Day 0. Safety will be assessed in all participants up to 28 days after vaccination, as applicable, in terms of occurrence of adverse events (AEs), and serious adverse events (SAEs) and adverse events of special interest (AESIs) up to 6 months post-vaccination 5.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
SINGLE
Enrollment
342
0.5 mL, Intramuscular
1.0 mL, Intramuscular
Unnamed facility
Pembroke Pines, Florida, United States
Unnamed facility
South Miami, Florida, United States
Unnamed facility
Boise, Idaho, United States
Unnamed facility
Raleigh, North Carolina, United States
Unnamed facility
West Jordan, Utah, United States
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).
Rabies virus neutralizing antibody titer will be determined by the rapid fluorescent focus inhibition test (RFFIT)
Time frame: Day 14 post-vaccination
Number of Participants Reporting Solicited Injection Site Reactions, Solicited Systemic Reactions, Unsolicited Systemic Reactions, and Serious Adverse Events Occurring Throughout the Trial
Solicited injection site reactions: pain, erythema, and swelling. Solicited systemic reactions: fever (temperature), headache, malaise, and myalgia.
Time frame: Day 0 up to 6 months post-vaccination
Geometric mean titer ratio (GMTR) following vaccination with either Purified Vero Rabies Vaccine, Serum Free or Rabies Human Diploid Cell Vaccine in a Simulated Rabies Post exposure Regimen
Rabies virus neutralizing antibody titer will be determined by the rapid fluorescent focus inhibition test (RFFIT)
Time frame: Day 14 post-vaccination
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