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Two boys have autoimmune diseases: one has Bruton-type agammaglobulinemia, and the other has DiGeorge syndrome. On...

Two boys have autoimmune diseases: one has Bruton-type agammaglobulinemia, and the other has DiGeorge syndrome. On a camping trip, each boy is stung by a bee, and each falls into poison ivy. What hypersensitivity reactions might each boy experience as a result of his camping mishaps?

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