Komaroff, A L, Goldenberg, D · The Journal of rheumatology. Supplement · 1989
This review describes ME/CFS as a serious illness where extreme tiredness lasts for more than 6 months, often starting suddenly like the flu. People with ME/CFS frequently experience fever, sore throat, muscle pain, swollen lymph nodes, brain fog, and mood problems. Blood tests sometimes show changes in immune cells and antibodies, and researchers have found links between ME/CFS and several viruses, particularly Epstein-Barr virus, though no virus has been proven to directly cause the disease.
This early systematic review helped establish ME/CFS as a distinct condition with reproducible immunological features, moving beyond dismissal of the disease as purely psychological. By documenting associations with viral infections and immune abnormalities, the study provided biological credibility to patient experiences and helped guide future research directions for understanding disease mechanisms.
This review does not prove that any virus causes ME/CFS—the authors explicitly state no causal role has been established for EBV or HBLV. The findings describe associations and frequent abnormalities, not universal diagnostic markers. The variability in laboratory findings across patients means these tests cannot yet be used to definitively diagnose the condition.
About the PEM badge: “PEM required” means post-exertional malaise was an explicit required diagnostic criterion for participant inclusion in this study — not that PEM was studied, observed, or discussed. Studies using criteria that do not require PEM (e.g. Fukuda, Oxford) are tagged “PEM not required”. How the atlas works →
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