Meanwhile, the anti-inflammatory subset Th2 and Treg, represented by CCR3+CD3+CD4+ and CCR5+CD25+CD3+CD4+ markers, respectively, both the naïve and memory phenotypes, were upregulated in our COVID-19 cohort relative to HCs, suggesting immunoregulation and counter-inflammatory mechanisms [10]. Here, CCR5 is linked to COVID-19.