Other studies in COVID-19 similarly reported CD8 T cells that were highly activated (De Biasi et al., 2020; Kuri-Cervantes et al., 2020b; Mathew et al., 2020; Zhang et al., 2020) had increased cytotoxic potential (Kuri-Cervantes et al., 2020b; Zhang et al., 2020) and exhibited characteristics of EMRA (or sometimes EM) cells (De Biasi et al., 2020; Mathew et al., 2020; Neidleman et al., 2020; Weiskopf et al., 2020). This evidence concerns the gene CD8A and COVID-19.