What is more, LLT1-coding gene, CLEC2D, was shown to be one of 10 hub differentially expressed genes (DEGs) between COVID-19 ARDS and control group patients in the bioinformatics analysis of RNA-sequencing dataset of COVID-19 ARDS, obtained from GSE163426, Gene Expression Omnibus (GEO) database (36). The gene discussed is CLEC2D; the disease is acute respiratory distress syndrome.