A monovalent chimpanzee adenovirus Ebola vaccine — preliminary report by Rampling, T, Ewer, K, Bowyer, G, Wright, D, Imoukhuede, E, Payne, R, Hartnell, F, Gibani, M, Bliss, C, Minhinnick, A, Wilkie, M, Venkatraman, N, Poulton, I, Lella, N, Roberts, R, Sierra-Davidson, K, Krähling, V, Berrie, E, Roman, F, De Ryck, I, Nicosia, A, Sullivan, N, Stanley, D, Ledgerwood, J, Schwartz, R, Siani, L, Colloca, S, Folgori, A, Di Marco, S, Cortese, R, Becker, S, Graham, B, Koup, R, Levine, M, Moorthy, V, Pollard, A, Draper, S, Ballou, W, Lawrie, A, Gilbert, S, Hill, A