(70) observed higher ferritin and hepcidin concentrations among early TB-progressors compared to delayed progressors (mean ferritin 50.2 vs. 26.2 ng/ml; p = 0.027; mean hepcidin 37.7 vs. 5.6 ng/ml; p = 0.036), while low transferrin around the time of Mtb exposure was identified as a risk factor for all progressors (70). This evidence concerns the gene TF and tuberculosis.