Some of these proteins, such as IFN-\documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{mathrsfs}\usepackage{upgreek}\setlength{\oddsidemargin}{-69pt}\begin{document}$$\alpha$$\end{document}α2, IP-10 and VEGF, have previously been shown to be correlated with risk of TB disease22. This evidence concerns the gene IFNA1 and tuberculosis.