A recent study has reported a relative loss of peripheral blood CD45RA+CD27+CCR7+CD95− naïve CD4 T cells compared with the controls, but increased CD45RA−CD27−CCR7+ EM2 and CD45RA+CD27−CCR7− EMRA cells in patients with COVID-19 compared to the healthy donors [37]. The gene discussed is FAS; the disease is COVID-19.