28+ Rh Positive Blood Type Facts Background. The universal plasma donor has type ab blood. The a positive blood type is actually the second most common blood type.
Among the four basic blood types, further organization is made, splitting each type into a positive and negative branch. The rarest blood type is rhnull. Antigens (on the surface of the red blood cells):
This blood type is present in 1 out of 3 individuals.
If you have type a+ blood, you have the same blood types as about one out of every three americans. If parental blood groups consist of ab and ab, the child's blood group will either be one of a, b, or ab. If the rh factor is present on the. Keep reading to find out.