This suggestion is correct, reflected in other cards, and a very high yield point. Multiple AMBoss articles, including the one below corroborate it " Tests cell-mediated immunity against M. tuberculosis-specific antigens by measuring the amount of IFN-γ released by T cells using ELISA "
https://next.amboss.com/us/article/5h0ief?q=interferon-γ+release+assay#Z458a37e029e124c3411130fa0cf210c7