BSG and COVID-19: Additionally, we compared the expression levels of CD147 mRNA levels in 25 COVID-19 patients and 25 controls, and we found a higher expression in COVID-19 patients compared with controls (COVID-19 median: 2.01, IQR 0.63 to 3.97; controls median 0.96, IQR 0.69 to 1.52, p = 0.04) (Figure 3a).