CXCL8 and COVID-19: We did not find a significant change in the IL-12R functionality (Figure 2d and Figure 3d); however, the cytokine receptor IFN-γR significantly increased TNF-α production at t2 after LPS or LPS plus rhIFN-γ stimulation (Figure 2e and Figure 3e), suggesting that blood immune cells from COVID-19 patients recovered their capacity to produce IL-8 and TNF-α after 14 days.