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An interferon-? release assay (IGRA) is a medical test used in the diagnosis of some infectious diseases, especially tuberculosis. Interferon-? (IFN-?) release assays rely on the fact that T-lymphocytes will release IFN-? when exposed to specific antigens. These tests are mostly developed for the field of tuberculosis diagnosis, but in theory, may be used in the diagnosis of other diseases that rely on

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