IL10 and myalgic encephalomeyelitis/chronic fatigue syndrome: The reduced anti-inflammatory cytokine (IL-10) level observed in the cerebrospinal fluid (CSF) may be related to neurological complications in patients with CFS/ME [16,17], and abnormal cytokine levels due to immune responses in SARS-CoV-2 infection have been reported to potentially contribute to the development of neurological complications, such as CFS/ME [18].