CRP and COVID-19: Studies have shown that inflammatory markers, C-reactive protein and neutrophil-to-lymphocyte ratio, are risk factors in COVID-19 patients.21-23 Excessive inflammatory responses, including high levels of cytokines, lymphocytosis, and mononuclear macrophage infiltration, are considered important reasons for the rapid progression of the disease.8 Our study found significant differences in white blood cell counts, neutrophil counts, and lymphocyte counts between the improvement group and the death group.