

@article {17294,
	title = {Duration of efficacy of Ty21a, attenuated Salmonella typhi live oral vaccine},
	journal = {VaccineVaccine},
	volume = {17 Suppl 2},
	year = {1999},
	month = {Oct 1},
	pages = {S22-7},
	edition = {1999/10/03},
	keywords = {*Polysaccharides, Bacterial, *Typhoid-Paratyphoid Vaccines, *Vaccines, Attenuated, Administration, Oral, Adolescent, Child, Child, Preschool, Chile, Double-Blind Method, Humans, Salmonella typhi/*immunology, Treatment Outcome},
	isbn = {0264-410X (Print)<br/>0264-410X (Linking)},
	author = {Levine, M. M. and Ferreccio, C. and Abrego, P. and Martin, O. S. and Ortiz, E. and Cryz, S.}
}
