Response of MoDCs to influenza virus. MoDCs were infected with influenza virus H1N1 (HK/54/98) at the indicated MOI. 24 hr after infection, cells were harvested and the surface expressions of CD86, CD83 and MHC-II (A-C) were examined to determine phenotypic maturation. Cells were stained with PI to examine the percentage of dead cells after infection (D). Data (n = 4) represented mean ± SD of four individual experiments. Statistical significance compared to MOI 0 *p < 0.05, **p < 0.01 (ANOVA).