Expression levels of the 35 classifier genes discriminating patients with influenza A infection from patients with bacterial infections. Scaled gene expression values (average difference intensity) are plotted for the 35 classifier genes represented in Figure 1B that discriminate between samples from patients with influenza A (11 samples, green squares) and bacterial infections (6 samples with E coli and 6 samples with S pneumoniae, red diamonds). Each plot represents one sample, lines represent median expression.