Depends on cause: Serum sickness. Thiis is commonly seen after settings such as a reaction to a foreign antigen (drug, infection, etc) and once that antigen resolves the immune complex reaction subsites - time depends can be days, weeks or months. But with a chronic setting where the antigen persists like in an autoimmune reaction in lupus, then the immune complexes persists and the condition continues.
Answered 6/17/2012
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