[Report on a long-term surveillance of diseases in Tianjin in 1981].
D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D003140:Communicable Disease Control / Q000379:methods*; D003141:Communicable Diseases / Q000453:epidemiology; D005260:Female; D006801:Humans; D007114:Immunization; D008297:Male; D009026:Mortality; D011051:Poliomyelitis / Q000150:complications; D011159:Population Surveillance; D012042:Registries; D013997:Time Factors