Many people are familiar with the ABO blood typing system, which lumps blood into the groups A, B, AB and O ... understand ...

The ratio of patients with type AB blood who had serious cases of COVID-19 was found to be 1.4 times higher than that for people with AB blood in the second group.

For instance, a study in Northwest Ethiopia found that blood group O was the most prevalent at 47.04%, while AB was the least common at 4.81%[1]. Similarly, research in Addis Ababa reported that ...

Human populations that left Africa evolved quickly whereas Neanderthals stayed the same, according to an analysis of blood group systems ... into the groups A, B, AB and O. The antigens on ...