Replication of VZV rOka, rOkaΔgI, and rOka-gI@Avr in human T cells. Thymus/liver implants infected with rOka (black), rOkaΔgI (zeros), and rOka-gI@Avr (white) were harvested at 7, 14, and 21 days after infection. The number of PFU/implant was determined using an infectious focus assay. Each bar represents the mean and standard deviation from three to five implants from two separate experiments.