A protective monoclonal antibody targets a site of vulnerability on the surface of Rift Valley fever virus by Allen, ER, Krumm, SA, Raghwani, J, Halldorsson, S, Elliott, A, Graham, VA, Koudriakova, E, Harlos, K, Wright, D, Warimwe, GM, Brennan, B, Huiskonen, JT, Dowall, SD, Elliott, RM, Pybus, OG, Burton, DR, Hewson, R, Doores, KJ, Bowden, TA