<p>The plots show (A) the gating strategy for live CD3<sup>+</sup> lymphocytes, (B) for CD4<sup>+</sup> (left) and CD8<sup>+</sup> (right) T cells. Gates were set on FMO no CD28 (C) and FMO no CD57 (D). Plots are shown for representative (E) West Nile virus (WNV) uninfected controls (WNV−) and (F) WNV infected subjects (WNV+) day 14 post-index donation.</p