title: Letter: Rubella virus transport in pregnancy.
mesh_terms: D005260:Female; D005865:Gestational Age; D006801:Humans; D008431:Maternal-Fetal Exchange; D010920:Placenta / Q000382:microbiology; D011247:Pregnancy; D011251:Pregnancy Complications, Infectious / Q000517:prevention & control*; D012409:Rubella / Q000517:prevention & control*; D012412:Rubella virus; D013997:Time Factors