While we're all more familiar with the ABO blood group system and the rhesus factor (that's the plus or minus part), humans actually have many different blood group systems based on the wide ...

One key historical link is Karl Landsteiner, the Nobel Prize-winning scientist who discovered the ABO blood group system.

ABO-Incompatible liver transplant at MIOT International hospital in Coimbatore, returning to normal routine soon.

Researchers from the UK and Israel have identified a new blood group system in humans, marking a major breakthrough in hematology. The discovery, published in September, stems from a puzzling case ...