[Epidemiology of chronic virus infections].
D002648:Child; D002675:Child, Preschool; D002908:Chronic Disease; D000013:Congenital Abnormalities / Q000453:epidemiology / Q000209:etiology; D003586:Cytomegalovirus Infections; D006801:Humans
Epidemiologiia khronicheskikh virusnykh infektsiĭ.