VEEV infection was limited to S100-β+ astrocytes and NeuN+ neurons in WT animals (Fig. 3A and Fig. S5A), whereas similar infection in Ifnar−/− animals led to GFP expression within BMECs and pericytes in both the cortex (Fig. 3B) and cerebellum (Fig. S5B). The gene discussed is S100B; the disease is infection.