The blood type B Negative, or B Rhd negative as it's professionally called, is extremely rare in the UK, with only one in every 200 people having it. It is for that reason alone that it is extremely valuable in terms of medical science and blood donors, as there is never enough of it for people in need. Whilst it is a positive thing for someone with B Rhd negative blood to donate, it is equally a disadvantage for those people as it will be much harder to come across when in need of blood transfusions and other medical procedures. If you have B negative blood type it means you have the B antigen present in your blood, as opposed to the A antigen in A blood types, both A and B in AB types and neither in O blood types. The race and ethnicity of a person plays an important part in determining their blood group, and race and ethnicity must be matched when matching a blood donor to recipient for transfusion.
There are certain risks inherent to all negative blood types, one of which being during pregnancy, when the mother is Rh- and the baby Rh+ the human body can build antibodies to fight against any foreign bodies, including the father's antigens in his blood. People with B negative blood types can only receive donations from donors with either the B negative blood type also, or O negative, and people with this blood type benefit mostly from double cell blood donation type.
There are certain risks inherent to all negative blood types, one of which being during pregnancy, when the mother is Rh- and the baby Rh+ the human body can build antibodies to fight against any foreign bodies, including the father's antigens in his blood. People with B negative blood types can only receive donations from donors with either the B negative blood type also, or O negative, and people with this blood type benefit mostly from double cell blood donation type.
