title: The prevalence of HB-Ag (Australia antigen) in the population of Liberia.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002353:Carrier State / Q000276:immunology*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006514:Hepatitis B Surface Antigens / Q000302:isolation & purification*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007988:Liberia; D008297:Male; D008403:Mass Screening; D008875:Middle Aged; D012424:Rural Population; D014505:Urban Population
chemical_list: D006514:Hepatitis B Surface Antigens