Expansion of BMLF1- and pp65-specific CD8⁺ T cells from day 0 to day 12. BMLF1-specific, pp65-specific, CD8⁺, and total cell numbers were calculated from the percentage of tetramer⁺ and CD8⁺ cells and from cell numeration from day 0 to day 12 (mean ± SE, n = 8). The mean ratio of pp65-specific CD8⁺ T-cell expansion to BMLF1-specific CD8⁺ T-cell expansion is indicated on the graph.