Breastfeeding babies of HBsAg-positive mothers.
D001942:Breast Feeding; D005260:Female; D006509:Hepatitis B / Q000517:prevention & control*; D006514:Hepatitis B Surface Antigens / Q000032:analysis; D006801:Humans; D007115:Immunization Schedule; D007116:Immunization, Passive; D007231:Infant, Newborn
D006514:Hepatitis B Surface Antigens