[EVALUATION OF VACCINES AND OF THE EFFECTIVENESS OF VACCINATIONS AGAINST TYPHOID FEVER. I. JUSTIFICATION AND PLAN FOR THE ORGANIZATION OF THE STUDY].
D011044:Poland; D012106:Research; D014435:Typhoid Fever; D014436:Typhoid-Paratyphoid Vaccines; D014611:Vaccination; D014612:Vaccines
D014436:Typhoid-Paratyphoid Vaccines; D014612:Vaccines
POLAND; TYPHOID-PARATYPHOID VACCINES