In addition to the aforementioned viral vectors, Thomas Evans and Aeras researchers are developing recombinant adenoviruses serotypes 4, 26, and the chimeric rAd5HVR8 as well as recombinant human CMV vectors for the delivery of TB antigens since these were found to be potent inducers of cellular immunity, including CD8+ T cell responses (Roberts et al., 2006; Alexander et al., 2012; Barouch et al., 2012). The gene discussed is CD8A; the disease is tuberculosis.