Potent immunogenicity and protective efficacy of a multi-pathogen vaccination targeting Ebola, Sudan, Marburg and Lassa viruse by Flaxman, A, Sebastian, S, Appelberg, S, Cha, KM, Ulaszewska, M, Purushotham, J, Gilbride, C, Sharpe, H, Spencer, AJ, Bibi, S, Wright, D, Schmidt, I, Dowall, S, Easterbrook, L, Findlay-Wilson, S, Gilbert, S, Mirazimi, A, Lambe, T