Rabies (Healthy Volunteers) clinical trials

Study of Purified Vero Rabies Vaccine Compared With Two Reference Rabies Vaccines, Given in a Pre-exposure Regimen to Children and Adults and as Single Booster Dose to a Subset of Adults

The primary objective of this study is: To demonstrate the Purified Vero Rabies Vaccine - Serum Free (VRVg-2) is non-inferior to Verorab and Imovax Rabies vaccines in each age group (pediatric and adult populations) when administered as a 3-dose pre-exposure prophylaxis (PrEP) regimen, in terms of proportion of participants achieving a rabies virus neutralizing antibody (RVNA) titer greater than or equal to (>=) 0.5 IU/mL at Day (D) 42, i.e., 14 days after the 3rd injection (for Primary Series Cohort 1). The secondary objectives of this study are: First 1-5 with hypotheses testing will be evaluated sequentially - only if the previous objective is achieved, will the next objective be tested. To demonstrate that: - the observed proportion of participants in the VRVg-2 (VRVg) group at D42 is at least 99% with a lower limit of the 95% confidence interval (CI) of at least 97% - VRVg is non-inferior (NI) to Verorab and Imovax Rabies vaccines (Imovax) in each age group at D28 - 2-dose VRVg at D28 is NI to 3-dose Imovax at D42 in each age group - the observed proportion of participants in the VRVg group at D28 is at least 99% with a lower limit of the 95% CI of at least 97% - 2-dose Imovax at D28 is NI to 3-dose Imovax at D42 in overall participants (Cohort 1) To describe: - the immune response induced by VRVg versus Verorab and Imovax at D28 and at D42 in all age groups - the immune response induced by VRVg at D14 after a booster dose of VRVg administered at Month (M) 12 (Cohort 1) and between M24 up to M36 (Cohort 2) - the persistence of immune response at M6,12,18, and pre-booster between M24 up to M36 post-primary series vaccination (Cohort 2) - safety profile of VRVg versus Verorab and Imovax in primary series and after a booster dose of VRVg.