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. After 50 years, this strange molecular absence finally led to researchers from the UK and Israel describing a new blood group system in humans.

After five decades of curiosity and investigation, scientists have uncovered a new blood group system known as MAL, marking a significant leap in our understanding of human biology. This groundbreaking discovery originated from an unusual medical case in 1972,

What blood type are you? That question usually results in a response of A, B, AB or O. Then maybe a positive or negative, also called the rhesus factor. However, researchers have now identified another elusive blood group after a 50 year mystery.