Your "high risk" comment seems like an overstatement. That press release does not give any actual numbers, but links to two studies. I quickly scanned the stud

Your "high risk" comment seems like an overstatement. That press release does not give any actual numbers, but links to two studies. I quickly scanned the studies, so may have missed something, but the Denmark one seems to indicate a ~10% higher risk for A/AB than O. While statistically significant, it does not seem like a massive difference. Also, importantly, it states: This study identifies ABO blood group as a risk factor for SARS-CoV-2 infection but not for hospitalization or death from COVID-19.