“…Different investigators have variously called the memory phenotype cells non-foreign antigen-derived memory (Kawabe et al, 2021), memory phenotype (Dobber et al, 1992;Haluszczak et al, 2009;White et al, 2017;Kawabe et al, 2020), innate memory (Kawabe et al, 2021), virtual memory (Akue et al, 2012;White et al, 2016) and yet others divide them into innate and virtual memory subsets (White et al, 2017). The CD44 + CD8 T cells have some of the positive attributes of true memory cells including more rapid cytokine production and response to some pathogens (Akue et al, 2012;Kawabe et al, 2020).…”