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 ...

The ABO blood group system was discovered over a hundred years ago by Karl Landsteiner, a discovery that would ultimately make modern transfusion and transplantation therapies possible. It is one mark ...

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 ...