Safety, infectivity, immunogenicity, and in vivo stability of two attenuated auxotrophic mutant strains of Salmonella typhi, 541Ty and 543Ty, as live oral vaccines in humans.Myron M. Levine, M F Edwards, Alf A. Lindberg et al.|Journal of Clinical Investigation|1987Cited by 189
Immunogenicity of Salmonella typhi Ty21a vaccine for young childrenJames R. Murphy, Myron M. Levine, L Grez et al.|Infection and Immunity|1991Cited by 56
Characteristics of Humoral and Cellular Immunity to Salmonella typhi in Residents of Typhoid-Endemic and Typhoid-Free RegionsJames R. Murphy, Myron M. Levine, Frederick Koster et al.|The Journal of Infectious Diseases|1987Cited by 48