Among these, CCL2, CCL19, CCL20, CXCL10, GM-CSF, IL-6, IL-8, IL-15, S100A9, and SCGF (all increased abundance) were strongly correlated with severity in hospitalized COVID-19 patients (r2 > 0.5, p < 0.001). This evidence concerns the gene CCL19 and COVID-19.