CD86 and COVID-19: Among them, 10 variables displayed significant differences between healthy controls and moderate and severe COVID‐19 cell donors as determined by Kruskal–Wallis test: (1) percentage of lineage‐negative cells, (2) neutrophil:lymphocyte ratio (NLR), (3) percentages of nonclassical monocytes within the CD45+ compartment and (4) pan‐monocytes, expression levels of CD64 in (5) neutrophils, (6) classical, (7) intermediate and (8) nonclassical monocytes as well as surface CD86 levels in (9) classical and (10) intermediate monocytes (Figure 2).