Because the infection cannot be cured, children with SCID often die quite soon before reaching adulthood. Iron Maiden 45th Anniversary 1975 2020 Christmas shirt. A retrovirus is used as a vector to carry copies of the gene responsible for encoding ADA to stem cells taken from a patient’s bone marrow. These modified stem cells are then transferred to the patient’s body so that they grow into ADA-produced white blood cells for months.
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