IL6 and COVID-19: In non-COVID-19 patients, only IL-6 was able to distinguish infiltrate above the median from infiltrate below the median (AUC = 0.81, p < 0.05, cut-off 15.3 pg/ml: sensitivity 77.8%, specificity 63.2%), opposite to DPP3 (AUC = 0.56, p = n.s).