If you have type AB blood, for example, your body is programmed to produce A and B antigens on red blood cells. A person with type O blood doesn't produce any antigens. Blood is said to be ...

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.

the “positive” or “negative” next to blood type refers to the presence or absence of the Rh factor on your red blood cells. Researchers know a lot about major blood types like A, B, AB, an ...

Healthcare professionals classify blood type according to the presence or absence of antigens, which are proteins attached to red blood cells. Of the eight main blood types, AB- is the least common.