[SOME ASPECTS OF TYPHOID EPIDEMIOLOGY].
D004813:Epidemiology; D006801:Humans; D014435:Typhoid Fever; D014436:Typhoid-Paratyphoid Vaccines; D014586:USSR
D014436:Typhoid-Paratyphoid Vaccines
EPIDEMIOLOGY; TYPHOID; USSR
NEKOTORYE VOPROSY 'EPIDEMIOLOGII BRIUSHNOGO TIFA.