Phase 2b/3 Trial of VSV-ΔG SARS-CoV-2 Vaccine (BRILIFE) Against Approved Comparator Vaccine. IIBR-100 (VSV-ΔG) is a self-propagating live virus vaccine that contains the spike protein of the Wuhan wild-type SARS-CoV-2 virus. Preclinical and phase 1/2 trials have demonstrated no safety signals of concern and have further demonstrated immunologic response that approximates the response seen