FIG. 1.
Kinetics of replication of HSV-1 (KOS) and IB1 viruses in Vero cells. Cultures were infected at a multiplicity of infection of 0.1 PFU per cell with HSV-1 (◘) or IB1 (•). At the indicated times, the cells were harvested and the virus was titrated by plaque assay on Vero cells. Mean values of two duplicate infections are shown.