[ONVARIOUS PROBLEMS OF VIRAL HEPATITIS].
D002648:Child; D002690:Chlamydia Infections; D003140:Communicable Disease Control; D003604:Czechoslovakia; D004813:Epidemiology; D006505:Hepatitis; D006506:Hepatitis A; D006801:Humans; D007223:Infant; D009017:Morbidity
CHILD; COMMUNICABLE DISEASE CONTROL; CZECHOSLOVAKIA; EPIDEMIOLOGY; HEPATITIS, INFECTIOUS; INFANT; MORBIDITY