Moreover, elevated IL-8 is characteristic of multiple EBV-associated diseases, such as NPC, gastric cancer, hemophagocytosis, chronic periodontitis, multiple sclerosis, murine models of NK/T lymphoma, infectious mononucleosis (IM), and post-IM chronic fatigue syndrome [49,50,51,52,53,54]. Here, CXCL8 is linked to myalgic encephalomeyelitis/chronic fatigue syndrome.