Of these, only two or three would match Mrs. Hutson’s in all respects. Blood groups are vastly more complex than the familiar indications on blood donors’ wallet cards or G.I.s’ dog tags.* ...

Researchers looking into a 50-year-old mystery surrounding a rare missing ... may have to add another group to the already ...

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" Four major blood groups ...

But the ultimate goal is to manufacture vital, but ultra-rare, blood groups that are hard to get hold of. These are necessary for people who depend on regular blood transfusions for conditions ...

Investigations are taking place into whether cases of a rare type of blood clot are connected to ... although this is not seen across all age groups and the difference remains small.