CRP and COVID-19: The high % lung lesions group also exhibited higher percentages of systemic symptoms (fever and fatigue) and respiratory symptoms (cough and shortness of breath), elevated levels of inflammatory biomarkers (white blood cell count, C-reactive protein [CRP], and ferritin), and a higher frequency of antiviral and immunosuppressive treatment for COVID-19 than did the low % lung lesions group (Table E1).