Different people have different types of blood running through their veins. Humans have four main blood groups: A, B, AB and O. These are defined by which antigens are present on the surface of red ...

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, ...

A routine medical test turned extraordinary for a woman from the Caribbean when doctors found something completely new in her blood. Nearly 15 years ago, while preparing for surgery in Paris, doctors ...

Human blood already comes in a bewildering variety of types, but researchers have now identified a new one so rare that only three people on the planet are known to carry it. The finding exposes just ...