SNCA and COVID-19: The GSEA analysis results show that the high expression of SNCA can activate Regulation of immune system process and T cell receptor signaling pathway in COVID-19 and DLBCL; high expression of SNCA can inhibit Mitotic cell cycle and Regulation of cyclin dependent protein kinase activity in COVID-19 and DLBCL, therefore, SNCA may participate in the crosstalk mechanism of COVID-19 and DLBCL through cell cycle and immune pathways.