title: A study of viral hepatitis B. in Egypt.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D001782:Blood Donors; D002648:Child; D002675:Child, Preschool; D004534:Egypt; D005260:Female; D006509:Hepatitis B / Q000453:epidemiology* / Q000276:immunology / Q000517:prevention & control; D006801:Humans; D007114:Immunization; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008875:Middle Aged; D012424:Rural Population; D014505:Urban Population