Concerning the 9q34.2 locus, it harbors the ABO, alpha 1-3-N-acetylgalactosaminyltransferase and alpha 1-3-galactosyltransferase (ABO) gene, which may modulate COVID-19 susceptibility and symptom severity through immunological interactions and inflammatory responses [11, 14]. The gene discussed is ABO; the disease is COVID-19.