The results showed that in TB patients, CXCR3 expression in CD4+ and CD8+ cell subsets was lower in the lung compared to the periphery, whereas in pneumonia, the CXCR3 expression in CD4+ and CD8+ cell subsets was lower in the periphery compared to the lung (Figures 9A,B). This evidence concerns the gene CXCR3 and susceptibility to pneumonia measurement.