When a pregnant woman had her blood sampled back in 1972, doctors discovered it was mysteriously missing a surface molecule found on all other known red blood cells at the time.

A decades-long search to identify a mysterious blood antigen has led researchers to a hidden genetic difference found in a tiny number of people.

NHS blood detectives have discovered a new blood group system, MAL, the 47th system to be discovered. This will enable better transfusion care for the very rare people who are AnWj negative, a blood t...

Scientists have identified the genetic cause behind the mysterious AnWj blood group antigen, solving a puzzle that began in 1972 and establishing a new blood group system called MAL. The discovery could make it much easier to find extremely rare AnWj-negative patients and donors and protect them from potentially dangerous transfusion reactions.

By now you must have heard about four blood groups. These are- A, B, AB and O. These blood groups can be negative or positive. Now scientists have solved a 50-year-old mystery by identifying a new blood group. Scientists have named this blood group 'MAL'. Scientists say that by identifying this blood group, it will be possible to identify those patients who are deficient in this weak blood group.