CFI Spinal Fluid study from Lipkin and Hornig is out.

halcyon

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"Our results indicate a markedly disturbed immune signature in the cerebrospinal fluid of cases that is consistent with immune activation in the central nervous system, and a shift toward an allergic or T helper type-2 pattern associated with autoimmunity." - Sexy.
They left room on the table for both hypothesis.

Although increased CSF CCL11 and CXCL10 levels in ME/CFS subjects, along with dysregulation of IL1 signaling, suggest the possibility of an allergic process in central compartments,49,50 such patterns may also be seen in a wide range of CNS infections.