CD8A and tuberculosis: Some in vivo studies in mice and bovines or in vitro work in humans provide evidence supporting the contribution of CD8 T cells to immunity against tuberculosis [8],[9],[10],[11],[12],[13],[14],[15],[16],[17],[18], whereas a number of studies in mouse models of tuberculosis have argued against a significant role for CD8 T cells in the control of primary M. tuberculosis infection [19],[20],[21],[22],[23],[24],[25].