Table 1.

Rare donor definitions per ARDP criteria

ABO group	Criteria
All ABO groups	negative for a high-prevalence antigen (<1/1,000), such as U, Jsb, Kpb, or Yta
Group O and A	negative for multiple common antigens R1R1, R2R2, R0R0, or rr; and K–; and Fy(a–) or Fy(b–); and Jk(a–) or Jk(b–); and S– or s– or R1R1, R2R2, or rr; and K–; and Fy(a–b–)
All ABO groups	IgA deficient; <0.05 mg/dl IgA