CXCR5 and infection: Genes downregulated by phenelzine were significantly (p < 0.05) enriched in chronic (34) (HCV) and progressor (35) (HIV) infected patients; exhausted compared to naive or activated T cells (36, 37, 39); TIM3+ compared to naïve or CXCR5+ (38); peak compared to latent (40) infections; and effector or memory compared to naïve cells (41, 42) (Figures 5B,C).