CXCR3 and COVID-19: Our overall analysis of such Tfh cell subsets patients with acute COVID-19 indicated that CXCR3+CCR6− Tfh1-like cells were significantly decreased compared with healthy control and COVID-19 convalescent patients 3.74 ± 0.21% vs. 5.79 ± 0.27% (p < 0.001) and 5.09 ± 0.23% (p < 0.001), respectively (Figure 2).