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 quite fit into the usual ABO system and hints that more hidden variations ...

ABO blood groups are the most basic system of blood typing. This system divides blood into four groups – A, B, AB and O. The other main grouping used is the Rhesus (Rh) system, which is either ...

There are different blood types: A, B, AB, and O, with each also being Rh-positive or Rh-negative. Knowing your blood type is important for safe blood transfusions and organ transplants. Type ...

Scientists discovered a new group of blood types called the Er system. They also say that there are many ways to classify blood, the knowledge of which assists in treating blood incompatibility issues ...