Homologous and heterologous re-challenge with Salmonella Typhi and Salmonella Paratyphi A in a randomised controlled human infection model. oleh Malick M Gibani, Celina Jin, Sonu Shrestha, Maria Moore, Lily Norman, Merryn Voysey, Elizabeth Jones, Luke Blackwell, Helena Thomaides-Brears, Jennifer Hill, Christoph J Blohmke, Hazel C Dobinson, Philip Baker, Claire Jones, Danielle Campbell, Yama F Mujadidi, Emma Plested, Lorena Preciado-Llanes, Giorgio Napolitani, Alison Simmons, Melita A Gordon, Brian Angus, Thomas C Darton, Vincenzo Cerundulo, Andrew J Pollard