IL6 and COVID-19: Nearly all COVID-19 patients exhibit elevated inflammatory markers, including IL-6, hs-CRP, SAA, and PCT, exceeding normal reference ranges (IL-6: 0-7 pg/mL, hs-CRP: 0-3 mg/L, SAA: 0-6.4 mg/L, PCT: 0-0.046 ng/mL).