CD8A and infection: Meanwhile, at the period of post‐infection, few CMV latency is found to remain in non‐haematopoietic cells, including vascular endothelial, lymph node interstitial, lung, and bone marrow cells, which are confirmed to be essential for driving antigen‐specific TCM and resident memory CD8+ T (TRM) cells proliferation, thus reducing TE/M population in circulating system.43, 117, 119