Meanwhile, a study by Gutiérrez-Bautista J. et al. demonstrated that naïve CD4+ T cells (CD45RA+, CXCR3−, CCR4−, CCR6−, CCR10−) were greatly overrepresented in non-ICU hospitalized patients with COVID-19 and ICU hospitalized patients [39]. This evidence concerns the gene CCR4 and COVID-19.