title: The numerology of T cell functional diversity.
abstract: Memory T cells are heterogeneous in phenotype and function. In this issue of Immunity, Newell et al. (2012) use a new flow cytometry platform to show that the functional heterogeneity of the human T cell compartment is even greater than previously thought.
authors.affiliation: Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA 02115, USA. nicholas_haining@dfci.harvard.edu
authors.forename: W Nicholas
authors.initials: WN
authors.lastname: Haining