IL6 and COVID-19: The resulting model included 7 factors, including the use of broad-spectrum antibiotics for more than 2 weeks (aOR=4.14, 95% CI 2.03-8.67), high BMI (aOR=0.85, 95% CI 0.75-0.94), fever (aOR=2.3, 95% CI 1.16-4.55), elevated log IL-6 levels (aOR=1.22, 95% CI 1.04-1.43), prone position ventilation (aOR=2.38, 95% CI 1.15-4.97),the use of COVID-19 immunoglobulin (aOR=0.45, 95% CI 0.2-0.97) and positive influenza virus nucleic acid test (aOR=3.35, 95%CI 0.78-14.65).