https://www.wikitree.com/g2g/1067199/new-clinical-study-link...
"A new genome-wide association study has identified a section of chromosome 3 where particular alleles are associated with severed effects after COVID_19 infection. This was then confirmed by a clinical trial of patients. The reported risk SNPs are having Cytosine (C) at position rs10490770 and Guanine (G) at rs35044562. These are in "full linkage disequilibrium", meaning if you have C at the first spot then you almost certainly have G at the second. And you can now check for C at rs10490770 in some 23andMe, Family Finder, and Ancestry raw data files, or directly on 23andMe using Browse Raw Data.
You can search for rs10490770 in your or other people's 23andMe v2,v3,v4, Family Finder and MyHeritage v1, or Ancestry v1,v2 raw data. It's not on the GSA chip, and therefore not on 23andMe v5, FTDNA v2, or MyHeritage v2. It is on Ancestry v1 and v2."
So you can search your 23andMe data for rs10490770 by going to https://you.23andme.com/tools/data/
More information and options are at https://customercare.23andme.com/hc/en-us/articles/115004310...
https://www.nature.com/articles/s41467-020-19623-x
(I'm not trying to be a jerk. I'm about to rush out the door, haven't had enough sleep and I think if we know something about what blood types are impacted, that's useful info.)
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.