| ME/CFS | Myalgic Encephalomyelitis/Chronic Fatigue Syndrome |
| SNP | Single-nucleotide polymorphism |
| PTPN22 | Tyrosine phosphatase non-receptor type 22 |
| CTLA4 | Cytotoxic T-lymphocyte-associated protein 4 |
| TNF | Tumor necrosis factor |
| IRF5 | Interferon regulatory factor 5 |
| CMV | Human cytomegalovirus |
| EBV | Epstein–Barr virus |
| HSV1 | Herpes simplex virus 1 |
| HSV2 | Herpes simplex virus 2 |
| VZV | Varicella-zoster virus |
| HHV6 | Human herpesvirus |
| CI | Confidence interval |
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