Moreover, an analysis of Italian population has shown that 3 SNPs of the chemokine CC-motif receptor (CCR)5 gene such as rs9845542, rs12639314, and rs35951367 (this when characterized by genotype GT) are weakly associated to increased risk of development of severe COVID-19 correlating with decreased lung expression of CCR5 [21]. Here, CCR5 is linked to COVID-19.