The Mantoux tuberculin skin test is often used to screen people at high risk for TB. Those who have been previously immunized may have a false-positive test result. The test may be falsely negative in those with sarcoidosis, Hodgkin's lymphoma, malnutrition, and most notably, active tuberculosis. Interferon gamma release assays (IGRAs), on a blood sample, are recommended in those who are positive to the Mantoux test. These are not affected by immunization or most environmental mycobacteria, so they generate fewer false-positive results. However, they are affected by M. szulgai, M. marinum, and M. kansasii. IGRAs may increase sensitivity when used in addition to the skin test, but may be less sensitive than the skin test when used alone.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What environmental substance are IGRAs affected by?
Ah, so.. unanswerable

Another major group, inhabitants who follow Eastern Orthodox Christianity, practised chiefly by the Russian minority, and the Russian Orthodox Church is the second largest denomination with 150,000 members. The Estonian Apostolic Orthodox Church, under the Greek-Orthodox Ecumenical Patriarchate, claims another 20,000 members. Thus, the number of adherents of Lutheranism and Orthodoxy, without regard to citizenship or ethnicity, is roughly equal. Refer to the Table below. The Catholics have their Latin Apostolic Administration of Estonia.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What is the major group that believes in Eastern Orthodox Christianity?
Ah, so.. Russian minority

Southern Baptist Landmarkism sought to reset the ecclesiastical separation which had characterized the old Baptist churches, in an era when inter-denominational union meetings were the order of the day. James Robinson Graves was an influential Baptist of the 19th century and the primary leader of this movement. While some Landmarkers eventually separated from the Southern Baptist Convention, the influence of the movement on the Convention continued into the 20th century. Its influence continues to affect convention policies. In 2005, the Southern Baptist International Mission Board forbade its missionaries to receive alien immersions for baptism.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): Who was an influential Baptist of the 18th century and the primary leader of this movement?
Ah, so..
unanswerable