Compared to AMC, both the percentage of neutrophils expressing the activation marker CD11b (82% (15) AMC vs. 68% (44) COVID-19, p = 0.0014, Figure 4A), and its surface expression (MFI: 399 (331) AMC vs. 40 (223) COVID-19, p = 0.0026, Figure 4B) were reduced in COVID-19 patients. Here, ITGAM is linked to COVID-19.