Doctors stumbled upon a type rarer than “golden blood”—and suspect more patients carry the bizarre genetic anomaly.

A blood type found in just three people is shaking up what we thought we knew about human biology. Called B(A), it doesn’t ...

An investigation into why blood doesn't always behave as doctors expect has revealed a super-rare mutation in an extremely uncommon variation of blood. Testing more than 544,000 blood samples in a ...

A strange medical finding has emerged from Thailand, and it’s already catching attention in the global science community.

When Nigel Vaughan was just 16 in the 1970s, he was told that he had “special blood” during a murder investigation. Vaughan, now 70, lived in Blackpool, England. After a murder took place, men within ...

A person's blood type is determined by "the presence or absence of certain antigens – substances that can trigger an immune response if they are foreign to the body," according to American Red Cross.

Most people don’t spare a thought for their blood type unless they’re in need of a transfusion — but could yours hold secrets to your health? There are four main blood types: A, B, AB and O.