PTPRC and COVID-19: We also observed reductions in two NK cell subsets (as a percentage of CD45+ PBMCs): CD3-CD56dimCD28hiIFNγ- (p = 0.0061, two-tailed Mann–Whitney U-test) and CD3-CD56bright (p = 0.0491, two-tailed Mann–Whitney U-test) (Supplemental Figure 6), which might account for the earlier observation that total NK cells were depleted in the convalescent COVID-19 immunome.