Nature 502, 100–104 (2013); doi:10.1038/nature12519

The Acknowledgements section of this Letter should have included the following sentence: “We acknowledge the contribution of M. A. Jarvis to the design, construction and initial in vitro characterization of all the strain 68.1-derived RhCMV vectors used in this study, including both previously published RhCMV/SIV vectors and a previously unpublished vector expressing an Mycobacterium tuberculosis Ag85B–ESAT6 fusion protein, used as a negative control in this study.” S.L.P. and J.M.T. did not reply when asked to approve the wording of this Corrigendum. The HTML version of the paper has been corrected.