Although we found that a drop in IFN-γ secretion to baseline levels correlated with symptom resolution for acute COVID-19 (Figs. 1 and 2) and Long Covid (Fig. 5), the cyclical changes in IFN-γ secretion in patients with Long Covid from Fig. 2B do not appear to correlate with severity of symptoms reported by the patients. Here, IFNG is linked to COVID-19.