A team of Massachusetts General Hospital (MGH) investigators has found no evidence of infections related to administration of allergy immunotherapy, the common practice of injecting minimal quantities of allergens beneath the skin to reduce the allergic response. Although there has never been a concern about the sterility of the preparations used in these "allergy shots," the organization that sets standards for the quality and safety of medications and other products has proposed revised guidelines that place allergen immunotherapy (AIT) in the same category as more risky preparations intended for intravenous or spinal administration.
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