title: [Analysis of the trends in typhoid-paratyphoid morbidity in the USSR].
abstract: Mathematico-statistical analysis of typhoid-paratyphoid infection morbidity in the USSR during 1900--1940 revealed a regular many-year cyclic recurrence of the changes in the morbidity level. The intensity of the morbidity level reduction at the periods of decline--in 1900--1917, 1920--1928, and in 1932--1939--was similar. A successive reduction of morbidity of this group of infections, by 6.45% on the average, annually, occurred in 1930--1976. The character of reduction of typhoid-paratyphoid infections morbidity level in the USSR during that period is well described by the exponential function.
mesh_terms: D004196:Disease Outbreaks / Q000453:epidemiology / Q000266:history; D049673:History, 20th Century; D006801:Humans; D010284:Paratyphoid Fever / Q000453:epidemiology* / Q000266:history; D011379:Prognosis; D014435:Typhoid Fever / Q000453:epidemiology* / Q000266:history; D014586:USSR
vernacular_title: Analiz tendentsiĭ zabolevaemosti tifo-paratifoznymi infektsiiami v SSSR.