Average CPE rates of cell lines. Cell lines were infected with oHSV1 or oHSV2 at MOI = 1 for 24 h.

10 fields of vision under the microscope were calculated and each CPE rate were calculated in the formula: CPE rate  =  number of CPE cells/number of total cells. The total CPE cells and total cells in the 10 microscopic fields were showed next to the percentages. The CPEs were observed with an inverted phase contrast microscope at 200× objective magnification.