title: A.I.D.S. update: how infection occurs.
mesh_terms: D015704:CD4 Antigens / Q000032:analysis*; D005260:Female; D005315:Fetal Diseases; D015658:HIV Infections / Q000635:transmission*; D006801:Humans; D010920:Placenta / Q000032:analysis*; D011247:Pregnancy
chemical_list: D015704:CD4 Antigens