IFNG and COVID-19: In participants with medically-validated-PASC infected less than one year ago, we confirmed the associations of acute COVID-19 with biomarkers that may be associated with severity, viral activation and vascular damage/activation ((IFNγ, IP-10, PD-L1, VCAM-1, ICAM-1)) with some symptoms (Supplementary Figs. S7–S9, Appendix 1 p17-19).