Transcriptional network of differentially expressed genes after YF17D vaccination, as inferred by gene set enrichment. Network representation of inferred transcription factors (11) and predicted target genes that are significantly modulated. Node colors indicate fold change of gene expression between day 0 and 7 in n = 11 volunteers. Rectangular nodes indicate transcription factors identified by gene enrichment; the different shapes indicate genes in the different functional categories of Fig. 3 (a–e). Genes that were subsequently evaluated by RT-PCR are identified by an asterisk. IRF1, IRF8, and genes targeted by IRF1 or IRF8, but no other transcription factors in the figure were removed to increase readability (see Fig. S1 for a complete map). Fig. S1 is available.