ABO and COVID-19: It is notable how various ongoing GWAS studies (The COVID-19 Host Genetics Initiative, 2020; 23andMe, 2020) did not confirm in their meta-analysis some other independently established genetic variant effects, which are otherwise broadly accepted by the scientific community as influencing COVID-19 severity, such as the ABO blood group (Li et al., 2020; Wu et al., 2020), or APOE e4 genotype (Kuo et al., 2020).