Age-affected 18 variables include comorbidity, hypertension, diabetes, lymphocyte, CD4+ and CD8+ T cells, IL8, TNFα, eGFR, hemoglobin, albumin, CK-MB, onset to admission, onset to PCR negative, discharged, secondary infection, acute kidney injury, and acute liver injury. Here, CXCL8 is linked to Hypertension.