title: Pregnant women are at increased risk for severe A influenza because they have low serum 25-hydroxyvitamin D levels.
authors: William B
authors: WB
authors: Grant
authors: John J
authors: JJ
authors: Cannell
mesh_terms: D005260:Female; D006801:Humans; D009980:Influenza A virus / Q000302:isolation & purification*; D007251:Influenza, Human / Q000097:blood / Q000150:complications* / Q000453:epidemiology; D011247:Pregnancy; D011251:Pregnancy Complications, Infectious / Q000097:blood / Q000453:epidemiology*; D012307:Risk Factors; D014807:Vitamin D / Q000031:analogs & derivatives* / Q000097:blood
chemical_list: D014807:Vitamin D; C104450:25-hydroxyvitamin D