For decades, most of us thought blood types were simple: A, B, AB, or O—each with a positive or negative Rh factor. But that’s just the surface. Scientists now recognize 48 distinct blood type groups, ...

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 ...

French scientists have discovered a new blood type in a woman from the Caribbean island of Guadeloupe, France's blood supply agency announced Friday. The woman is the only known carrier of a new blood ...

Scientists have found a link between blood type A and a higher risk of stomach cancer. This connection appears over time. Blood group antigens on stomach cells may play a role. They can affect how the ...

Type 2 diabetes becomes more dangerous to the heart the longer a person has it. Researchers found that after several years, ...

Making a Type-O kidney from a donor of another blood type has long been synthetic medicine's white whale. Share on Facebook (opens in a new window) Share on X (opens in a new window) Share on Reddit ...

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 ...

The following essay is reprinted with permission from The Conversation, an online publication covering the latest research. In a routine blood test that turned extraordinary, French scientists have ...

It started with a routine blood test before surgery. What doctors discovered next hadn’t been seen in medical history. For decades, most of us thought blood types were simple: A, B, AB, or O—each with ...