LZTFL1 and COVID-19: Finally, the AncestryDNA COVID-19 host genetic study identified COVID-19 genetic associations with SLC6A20, LZTFL1 variants on the chromosome, ABO locus on chromosome 9 and a novel association on chromosome 11 that includes Polypeptide N-Acetylgalactosaminyltransferase 18 (GALNT18) [24].