COVID-19 patients showed, compared to healthy controls, decreased CD10 levels after activation [median MFI, 43 x 103 (IQR 33 x 103-75 x 103) vs. 10 x 104 (IQR 86 x 103-13 x 104), p < 0.0001), Figure 3]. The gene discussed is MME; the disease is COVID-19.