Hepatitis A. I. Persistence of passive maternal immunity in infants aged less than six months.
D000914:Antibodies, Viral / Q000032:analysis*; D005260:Female; D005312:Fetal Blood / Q000276:immunology; D006506:Hepatitis A / Q000276:immunology*; D006801:Humans; D007112:Immunity, Maternally-Acquired; D007223:Infant; D007231:Infant, Newborn; D008431:Maternal-Fetal Exchange; D011247:Pregnancy; D013997:Time Factors
D000914:Antibodies, Viral