title: The live oral typhoid vaccine Ty21a: recent field trial results.
authors.forename: R
authors.initials: R
authors.lastname: Germanier
authors.forename: M M
authors.initials: MM
authors.lastname: Levine
mesh_terms: D000284:Administration, Oral; D002648:Child; D002677:Chile; D002986:Clinical Trials as Topic; D004311:Double-Blind Method; D004534:Egypt; D006801:Humans; D011897:Random Allocation; D014435:Typhoid Fever / Q000517:prevention & control*; D014436:Typhoid-Paratyphoid Vaccines; D014613:Vaccines, Attenuated
chemical_list: D014436:Typhoid-Paratyphoid Vaccines; D014613:Vaccines, Attenuated