d-f, Representative images of WNV envelope antigen and TdT-mediated dUTP nick end labelling (TUNEL) staining (d) (T, Tat alone), quantification of cell death in brain (e) and survival curves (f) for 5-day-oldC57BL/6Jmice infected with WNV (Egypt strain 101, 1 p.f.u. intracerebral (i.c.)) and treated daily with peptide (D-amino acid forms, 20mgkg−1 i.p. beginning 1day post-infection). Images in d are from cerebral cortex day 6 post-infection. Similar results were observed in all regions of the brain for three mice per group. Scale bar, 20μm. Bars in e represent mean±s.e.m. TUNEL-positive cells per unit area of brain for three mice. g 