title: [viral hepatitis].
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002648:Child; D002675:Child, Preschool; D005260:Female; D006505:Hepatitis / Q000453:epidemiology*; D006509:Hepatitis B / Q000517:prevention & control; D006801:Humans; D007223:Infant; D008297:Male; D008875:Middle Aged; D011044:Poland; D012621:Seasons; D012744:Sex Ratio
vernacular_title: Wirusowe zapalenie watroby.