The blood type and the Rh. DAdamo thinks there is and he outlines it in his book.
If a person needs a blood transfusion their blood type. Every Blood Type Has Its Perks. As mentioned above depending on the presence or absence of a particular antigen these groups are classified as positive and negative. O is the real. O Positive is a bicoastal production company that Creativity calls small but mighty. Clinically and almost exclusively ABO incompatibility occur in A and B blood group babies of O ve mothers. Blood types also contain a positive or negative mark depending on the presence of the Rhesus or Rh antigen. Types O negative and O positive are in high demand.