CRP and COVID-19: In addition, for COVID-19 patients without GI symptoms, the median levels of IgM, IgG, IL-6, SAA, CRP, PCT, and NLR were 195.1 IU/mL, 521.1 IU/mL, 10.1 pg/mL, 71.8 mg/mL, 15.4 mg/mL, 0.268 ng/mL, and 6.35, respectively.