Frequency of BMLF1 peptide-responsive CD8⁺ cells.

PBMC from 13 healthy EBV-seropositive donors, 11 HLA-A2 and 2 non-HLA-A2, were incubated with 10 μg/mL of the BMLF1 peptide (residues 280-288) in ELISPOT assays. Each bar represents the mean ± SD as determined in 2 separate experiments; data from each experiment represent the average of triplicate wells.