title: One bug or another: promiscuous T cells form lifelong memory.
abstract: As humans age, their T cell repertoire becomes dominated by cells exhibiting "memory" characteristics. In this issue of Immunity, Su et al. (2013) demonstrate that a large percentage of virus-specific CD4(+) T cells also exhibit a memory phenotype in unexposed adults.
authors: Department of Microbiology, University of Iowa, Iowa City, IA 52242, USA.
authors: Jeffrey C
authors: JC
authors: Nolz
authors: John T
authors: JT
authors: Harty