Among these 10 shared SNPs, rs144204502 was found to colocalize between LTL and COVID-19 susceptibility (PP.H4 = 0.66) (Fig. 2C and Supplementary Table 4), which is located near TK1 and encodes a cytosolic enzyme that catalyzes the addition of a gamma-phosphate group to thymidine [55]. This evidence concerns the gene TK1 and COVID-19.