Transplacental spread of influenza virus.
D005260:Female; D005315:Fetal Diseases / Q000382:microbiology*; D006801:Humans; D007231:Infant, Newborn; D007251:Influenza, Human / Q000382:microbiology / Q000635:transmission*; D008431:Maternal-Fetal Exchange; D011247:Pregnancy; D012698:Serologic Tests