Recently, it was reported that the knockdown of Prdm9 in CD8+ T cells by shRNA led to an increased frequency of KLRG1−CD127+/CD62L+CD127+ memory‐like CD8+ cells and decreased frequency of CD62L−CD127− effector‐like cells at 7–21 days post‐LCMV Armstrong infection [39]. The gene discussed is CD8A; the disease is infection.