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 ...

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

Not to B-negative, but your blood type could offer a clue to your risk of having a stroke before 60. “The number of people with early strokes is rising,” said Dr. Steven J. Kittner, co-principal ...

Your blood type might seem like a minor detail in your medical history, but it carries significant implications for your health and medical care. From emergency transfusions to pregnancy planning, ...

Blood type is usually determined during hospital visits, especially when a transfusion may be needed, such as in surgery or childbirth. [File, Standard] Many of us first learned our blood types during ...