title: Letter: HBAg carrier state in an infant delivered by caesarean section.
mesh_terms: D002353:Carrier State; D002585:Cesarean Section; D005260:Female; D006509:Hepatitis B; D006511:Hepatitis B Antigens; D006801:Humans; D008431:Maternal-Fetal Exchange; D010920:Placenta / Q000382:microbiology; D011247:Pregnancy
chemical_list: D006511:Hepatitis B Antigens