Accelerating clinical development of a live attenuated vaccine against Salmonella Paratyphi A (VASP): study protocol for an observer-participant-blind randomised control trial of a... oleh Melanie Greenland, Elizabeth Jones, Xinxue Liu, Andrew J Pollard, Brian Angus, Susana Camara, Hannah Robinson, Marije Verheul, Jennifer Hill, Myron M Levine, Katherine Emary, Nisha Singh, Naina McCann, Florence Mclean, Young Chan Kim, Kerry Conlin, Maheshi N Ramasamy