title: Hepatitis B virus surface antigen (HBsAg) mutants in Singapore adults and vaccinated children with high anti-hepatitis B virus antibody levels but negative for HBsAg.
authors.forename: W N
authors.initials: WN
authors.lastname: Chen
authors.forename: C J
authors.initials: CJ
authors.lastname: Oon
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D004279:DNA, Viral / Q000032:analysis; D005260:Female; D006509:Hepatitis B / Q000517:prevention & control* / Q000821:virology; D006510:Hepatitis B Antibodies / Q000097:blood*; D006514:Hepatitis B Surface Antigens / Q000235:genetics*; D017325:Hepatitis B Vaccines; D006515:Hepatitis B virus / Q000276:immunology / Q000302:isolation & purification; D006801:Humans; D007223:Infant; D008297:Male; D008875:Middle Aged; D009154:Mutation; D016133:Polymerase Chain Reaction; D012846:Singapore; D014611:Vaccination
chemical_list: D004279:DNA, Viral; D006510:Hepatitis B Antibodies; D006514:Hepatitis B Surface Antigens; D017325:Hepatitis B Vaccines