Oral typhoid vaccine Ty21a.
D000284:Administration, Oral; D006801:Humans; D007115:Immunization Schedule; D014435:Typhoid Fever / Q000517:prevention & control*; D014436:Typhoid-Paratyphoid Vaccines / Q000008:administration & dosage*; D014613:Vaccines, Attenuated / Q000008:administration & dosage*
D014436:Typhoid-Paratyphoid Vaccines; D014613:Vaccines, Attenuated