Frequency of LCL-responsive CD8⁺ cells.

Isolated CD8⁺ cells from 13 healthy EBV-seropositive and 3 seronegative donors were incubated with autologous LCL stimulators 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.