CD8A and infection: Additionally, CD8+ T cell IL-2 expression was never significantly above background during this chronic period of infection (Fig. 8) when examined as a ratio of splenocytes to CD8+ T cells (data not shown), as a percent of CD8+ T cells (Fig. 8B), and as a mean, though IL-2 was significantly lower when examining the mean fluorescence intensity (p<0.05; data not shown).