CD8A and infection: Despite the above similarities, the appearance and frequency of SIINFEKL/Kb complexes expressing cells (Figure 8D), the density of SIINFEKL/Kb complexes at the cell surface (Supplementary Figure 3B) and the OVA-specific CD8+ T cell activation (Figure 8E) were significantly enhanced after infection of BMDC with MVA-B5-OVA as compared to MVA-Pl-OVA.