Low and highly variable B cell responses were observed in the 0.015 g dose group, possibly because of the very low dose used. Further, vaccine-induced Tcell-mediated immune responses against the spike antigen were analyzed in mice YH239-EE spleens at 2wp2 by intracellular-cytokine-staining and multi-parametric flow cytometry, afterexvivorestimulation with full-length spike, S1, S2, or receptor-binding domain […]