Localization of HP- and true-memory cells relative to CD11c+ cells. Confocal images of serial spleen sections from co-transfer recipients (day 2 of infection). Sections were stained for CD11c, B220, or CD4, and congenic markers for HP-memory (A), true-memory (B), and HP- and true-memory (C). D, Spleen (day 5) was stained for CD11c, both memory subsets, and B220 (10× magnification). Images are taken at 20× magnification unless noted. Representative of three experiments (n = 2–3) per time point.