Survival by stratum, donor type, and infection at the time of transplant. (A) OS was significantly better in patients transplanted without infection (OS, 95%) compared with those with active infection at the time of transplant (OS, 81%; P = .009). (B) OS was similar in those presenting with typical SCID and assigned to stratum A (OS, 89%) compared with those presenting with leaky SCID or Omenn syndrome and assigned to stratum B (OS, 90%; P = .66). (C) OS was similar in those diagnosed via NBS/FH (OS, 90%) compared with those diagnosed by other means (OS, 90%; P = .67). (D) OS was not significantly different by donor type: 100% for MRD; 96% for MMRD; 90% for URD; and 81% for UCB (P = .17).