CD4 and COVID-19: As compared with controls, SARS-CoV-2-infected adults with less severe COVID-19 who were treated as outpatients had no reduction in ILCs, but 1.44-fold fewer CD16+ NK cells (95% CI: 1.93–1.07; p = 0.018), and 1.26-fold higher CD4+ T cells (95% CI: 1.06–1.5; p = 9.59 x 10–3) (Table 2 and Figure 3B).