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Thanks to Turner et al for commenting on our article. Turner et al challenge our finding that the Bacillus Calmette-Guérin vaccine (BCG) can prevent Mycobacterium tuberculosis infection (MTI), and propose an alternative explanation: that the absence of a positive interferon gamma release assay (IGRA) could be due to antigenic sin and does not necessarily demonstrate absence of infection.
A positive IGRA is the best available surrogate for MTI, but we are fully aware of its limitations. With the IGRA test, MTI is defined by a T-cell-induced interferon gamma response to M tuberculosis antigens …
Footnotes
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Contributors SWM drafted the manuscript. EMA, STH, BS, MM, JW, LC, AK, TL and HCFS advised on the content. All authors approved the final version. SWM is the guarantor of the manuscript.
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Competing interests None.
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Ethics approval Commission for Scientific Research in Greenland.
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Provenance and peer review Not commissioned; internally peer reviewed.