Mucosal-associated invariant T (MAIT) cells are an innate-like population of unconventional T cells that respond rapidly to microbial metabolite Ags or cytokine stimulation. Because of this reactivity and surface expression of CD45RO+, CD45RA-, and CD127+, they are described as effector memory cells. Yet, there is heterogeneity in MAIT cell…[Read more]