CD24 and COVID-19: The mRNA expression level of CD24 was significantly upregulated in the COVID-19 patients who required ventilatory support (M = 6.148, SD = 1.611, Table 1) as compared to patients who did not need mechanical ventilation (M = 5.120, SD = 1.252, Table 1) (p = 4.175e-04) while the CSF1R exhibited an opposite trend (p = 5.859e-07) (Fig. 1D and E, and Table 1).