CD209 and COVID-19: It should be noted that the present study developed a therapeutic hypothesis for CD209 based solely on the strong evidence of association of the ABO signal with plasma concentrations of CD209 and evidence from the pan-MR association of CD209 with COVID-19 phenotypes (the pan-MR associations being driven mainly by trans-acting ABO SNPs) with no corresponding support of cis-MR or colocalisation.