title: Differentiation of actively and passively acquired complement-fixing antibodies in infants with respiratory syncytial virus infection.
mesh_terms: D000906:Antibodies / Q000032:analysis*; D000917:Antibody Formation; D000941:Antigens; D002499:Centrifugation, Density Gradient; D003168:Complement Fixation Tests; D005260:Female; D006801:Humans; D007112:Immunity, Maternally-Acquired; D007074:Immunoglobulin G; D007223:Infant; D007231:Infant, Newborn; D008431:Maternal-Fetal Exchange; D009976:Orthomyxoviridae Infections / Q000175:diagnosis / Q000276:immunology*; D011247:Pregnancy; D012136:Respiratory Syncytial Viruses / Q000276:immunology*
chemical_list: D000906:Antibodies; D000941:Antigens; D007074:Immunoglobulin G