The<unk> -negative blood type is rare. The highest prevalence of<unk> -negative blood has been reported in Sweden, where approximately 1 in 1200 individuals exhibit this phenotype. Only about 1 in 3000 English people and 1 in 4000 Southern Europeans are<unk> -negative, and much lower rates have been reported in people of African and Asian heritage.
Vel blood group
Indian blood group system
Hh blood group
Junior blood group system
P1PK blood group system
Rh blood group system
Sid blood group system
Augustine blood group system