I recommend reading the review below on known effects of blood groups on infection. Not super surprising in that blood group may have general effects. I can't t

I recommend reading the review below on known effects of blood groups on infection. Not super surprising in that blood group may have general effects. I can't think how this would work mechanistically without knowing the glycans on ACE2/TRMPSS2 or the spike, and if they carry antigen (I would expect not). https://www.ncbi.nlm.nih.gov/m/pubmed/26085552 https://www.ncbi.nlm.nih.gov/m/pubmed/26085552