Is PEM Autoimmune? The Complex Link Between Post-Exertional Malaise and Autoimmunity
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5 min read
According to a 2024 review, there is inconsistent evidence to classify Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS) as a purely autoimmune disease, though a subgroup with an autoimmune component may exist. This uncertainty extends to Post-Exertional Malaise (PEM), the hallmark symptom of ME/CFS, which remains a subject of intense scientific investigation into its underlying causes.