title: Challenges remain in preventing mother-to-child HIV transmission.
mesh_terms: D005260:Female; D015658:HIV Infections / Q000635:transmission*; D006801:Humans; D018445:Infectious Disease Transmission, Vertical / Q000517:prevention & control*; D011247:Pregnancy; D011251:Pregnancy Complications, Infectious / Q000517:prevention & control*; D014481:United States