title: An epidemic of acute viral hepatitis type B.
mesh_terms: D000208:Acute Disease; D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D006509:Hepatitis B / Q000453:epidemiology*; D006511:Hepatitis B Antigens / Q000302:isolation & purification; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008875:Middle Aged; D012621:Seasons; D015022:Yugoslavia
chemical_list: D006511:Hepatitis B Antigens