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 ...

To say that blood is vital is a huge understatement. It flows through the organs that make up the circulatory system — the heart and blood vessels and veins — delivering oxygen, nutrients, and ...

In a routine blood test that turned extraordinary, French scientists have identified the world’s newest and rarest blood group. The sole known carrier is a woman from Guadeloupe whose blood is so ...

A new study reveals an especially rare blood type that was not known until today – and only three people in the world have it. The discovery, which was made almost by accident, took place as part of a ...

In a routine blood test that turned extraordinary, French scientists have identified the world's newest and rarest blood group. The sole known carrier is a woman from Guadeloupe whose blood is so ...

Zainab Mughal, a 2-year-old girl from Miami, needs blood transfusions for her cancer treatment but she has a blood type so rare that so far only four donors worldwide have been identified. In August, ...