They are either negative or positive. But do you know that there is another rare blood group, that is very hard to detect and ...

After 50 years, scientists discover the MAL blood grouping system, solving a genetic mystery and improving transfusion safety worldwide.

There are other types of blood that are as rare, if not rarer, than Rhnull. As of 2022, the International Society of Blood Transfusion, a scientific society that promotes the study of blood ...

Blood bags, sorted by type, line a tray at a hospital. Some blood types are more common than others. ER Productions Limited/Getty Images ...

The MAL blood group is caused by mutations in both copies of the MAL gene, leading to the absence of the AnWj antigen in rare cases. ‘X-rays before gamma rays?’: Einstein Probe challenges ...