Interestingly, in the peripheral blood of patients recovered from COVID-19, the proportion of Tfh cells did not differ from the control values, while there was an increase in CXCR5+PD-1highCD4+ Tfh and CCR7loPD-1+ effector memory follicular cells (Tfh-em) and a decrease in CCR7hiPD-1– follicular cells of central memory (Tfh-cm) capable of migrating into lymphoid tissue [121]. The gene discussed is CXCR5; the disease is COVID-19.