title: Attenuated Salmonella becomes versatile vector in multivalent, multipurpose genetic vaccines.
mesh_terms: D000820:Animal Diseases / Q000517:prevention & control; D000818:Animals; D001428:Bacterial Vaccines; D005818:Genetic Engineering; D005822:Genetic Vectors; D006801:Humans; D012485:Salmonella typhi / Q000276:immunology*
chemical_list: D001428:Bacterial Vaccines