Characteristics of humoral and cellular immunity to salmonella typhi in residents of typhoid-endemic and typhoid-free regions
Murphy, James R.; Baqar, Shahida; Muñoz, Carlos; Schlesinger, Liana; Ferreccio, Catterine; Lindberg, Alf A.; Svenson, Stefan; Losonsky, Genevieve; Koster, Frederick; Levine, Myron M. (1987)