Surveillance of acute respiratory diseases in the Czechoslovak Socialist Republic (CSSR).
D000208:Acute Disease; D000293:Adolescent; D001991:Bronchitis / Q000453:epidemiology; D002648:Child; D002675:Child, Preschool; D003604:Czechoslovakia; D006801:Humans; D007223:Infant; D007251:Influenza, Human / Q000453:epidemiology; D011014:Pneumonia / Q000453:epidemiology; D012140:Respiratory Tract Diseases / Q000453:epidemiology*