IL6 and COVID-19: The results obtained showed that ferritin at 24 h ≥ 1225 ng/dl, IL-6 at 24 h ≥ 11 pg/ml, PaFiO2 at 72 h ≤ 164 mmHg, NLR at 24 h ≥ 22, and SOFA at 72 h ≥ 6 are the best predictors of COVID-19 mortality.