The data reported by others suggest that peripheral blood of patients recovered after COVID-19 had elevated proportion of CXCR3+CCR6− Tfh1 and CXCR3−CCR6− Tfh2 cells compared with control group, whereas percentage of CXCR3−CCR6+ Tfh17 cells was significantly decreased [28]. The gene discussed is CCR6; the disease is COVID-19.