And this is a pretty useful feature of IGRAs since BCG vaccine is given to a lot of children around the world to prevent disseminated TB.

这是IGRA很有用的一种特性，因为世界上很多小孩都接种过卡介苗，来预防TB在体内的播散。

As an alternative to tuberculin skin test, there are also interferon gamma release assays or IGRAs which look for evidence in the blood of previous exposure to TB proteins.

作为结核菌素试验的替代性试验，γ-干扰素体外释放试验分析技术（IGRA）是寻找在血液中曾经接触过TB蛋白的证据。