989673.fig.004a
(a)
989673.fig.004b
(b)
989673.fig.004c
(c)
989673.fig.004d
(d)
989673.fig.004e
(e)
989673.fig.004f
(f)
989673.fig.004g
(g)
989673.fig.004h
(h)
Figure 4: PD-L1 expression is increased on dendritic cells and T cells from PBMCs of patients with acute influenza infection. Cell proportions and surface PD-L1 expression on cDCs and pDCs (a–d) and CD4+ and CD8+ T cells (e–h) from cryopreserved PBMCs from patients with confirmed infection with A(H1N1)pdm09 virus (pH1N1+), patients with influenza-like illness but with a negative RT-PCR result for pandemic H1N1 influenza (pH1N1−), and healthy controls (HC, ; error bars indicate SEM) were analyzed by flow cytometry. MFI: mean fluorescence intensity; pH1N1: A(H1N1)pdm09 virus. * , ** , and *** (Mann-Whitney test).