The Glycerophospholipid metabolism, Oxidative phosphorylation, and Purine metabolism metabolic pathways were significantly expressed in B_c1_TCL1A, B_c2_CD27, and CD8T_c1_CCL5 cell subpopulations, particularly notable during the mid-stage of infection, as illustrated in Figure 6B. The gene discussed is CCL5; the disease is infection.