What does Rh positive blood mean and how is it differerent to RH negative blood?
Your blood type is determined (genetically) by the presence or absence of specific surface antigens on the membrane of the RBC. The most important RBC surface antigens are A, B and Rh.Blood can be either Rh positive(Rh+) or Rh negative (Rh-) depending on the presence (Rh+) or absence of the Rh antigen (Rh-) on the surface of the cell.Unlike the ABO system, type Rh- blood does not normally carry anti-Rh antibodies, unless the individual has been sensitized by previous exposure (usually pregnancy).The most common blood type is O+.