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CD95 expression by lymphocytes after sham exposure (open symbols and bars) or exposure to virus (solid symbols and bars). Results from five experiments are presented as the mean percentage of CD4+ (A) or CD8+ (B) cells that were CD95 positive ± SD and as the mean number of molecules of CD95 expressed on the surface of the CD4+ (C) and CD8+ (D) cells. For each time point, the data from 10,000 CD4+ or CD8+ cells were collected.
