Effect of cell-free HHV-7 inoculation on SupT1 cells evaluated at different days pi. (A) Total number of viable cells scored by Trypan blue dye exclusion. (B) Percentage of apoptosis evaluated by flow cytometry after PI staining. (C) Cell-associated HHV-7 DNA evaluated by quantitative PCR (values are referred to 250 cells). Results of one representative of three separate experiments performed in duplicate are shown.