Blood type O may have less risk to COVID

and less risk to more severe outcome! Good news for them! A study of patient data also showed that types A and AB had higher risks. They don't know why it is or if A/AB is more vulnerable, but it is interesting and will probably lead to deeper research.

I, naturally, am in the latter group.

This isn't really a "study" study, more of a "looking over a data set and outcomes" observation, so people are looking over more data sets across more regions.

https://www.cnn.com/2020/10/14/health/blood-group-covid-19-scn-wellness/index.html