Disease Associated with Immune System
Bone marrow given to an infant with SCID must

come from a donor that shares some MHC alleles with the recipient
come from one of the child's parents
contain mature T cells that can begin making immune responses immediately
be irradiated to eliminate GVHD

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Disease Associated with Immune System
To treat HIV infections using drugs, the major problem is that

the drugs interfere with normal digestion
the drugs that are good inhibitors cannot by synthesized
the virus particles with altered (mutant) proteases arise
the drugs are rapidly degraded

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