MME and COVID-19: Figure 3A shows a different profile of granulocyte populations within patients with severe COVID-19 and healthy controls. Notably, when the cell populations are made to overlap, we observed that cluster 4 disappears in infected individuals. The cluster exhibits the expression of CD66+CD10+CD16lowCD15+, whose cells present characteristics of non-activated cells owing to the low expression of CD16 (Figure 3A–C).