title: Failures with oral typhoid vaccine Ty 21a.
mesh_terms: D000284:Administration, Oral; D000328:Adult; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D008297:Male; D014435:Typhoid Fever / Q000517:prevention & control*; D014436:Typhoid-Paratyphoid Vaccines / Q000627:therapeutic use
chemical_list: D014436:Typhoid-Paratyphoid Vaccines