Disease Associated with Immune System
A selective IgA deficiency would be expected to result in problems with

infections following dental work due to bacteria entering the bloodstream
mucosal pathogens
pathogens which can survive inside macrophages
bacterial infections

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Disease Associated with Immune System
Difficulties with somatic gene therapy arise from all of the following except

transducing genetic material into stem cells
GVHD caused by mature T cells in the transplanted cells
limited life span of more mature hematopoietic cells
inserting a gene so that it will function properly

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