People with O negative blood often wonder how rare their blood is since it is always in demand by hospitals and blood centers. Only about 1 in 67 have B negative blood, making it rarer. However, the rarest blood type in the world is Rh-null, which is so rare most of us have never heard of it.

What is so special about O negative blood?

O negative is the rarest of all types and this blood type has no antigens. This makes it possible for donated O negative blood to be used for transfusion for other blood types, but an individual who has O negative blood can only receive blood from other O negative donors.

Which is more rare O negative or a negative?

What are the 3 rarest blood types?Blood typePrevalence in the United States (Percentage of the United States population)B positive (B+)8.5%AB negative (AB-)0.6% (Rarest)AB positive (AB+)3.4%O negative (O-)6.6%4 more rows•25 Nov 2020