Seasonal and pandemic influenza during pregnancy and risk of fetal death: A Norwegian registry-based cohort study.

ABSTRACT: Previous studies of fetal death with maternal influenza have been inconsistent. We explored the effect of maternal influenza-like illness (ILI) in pregnancy on the risk of fetal death, distinguishing between diagnoses during regular influenza seasons and the 2009/2010 pandemic and between trimesters of ILI. We used birth records from the Medical Birth Registry of Norway to identify fetal deaths after the first trimester in singleton pregnancies (2006-2013). The Norwegian Directorate of Health provided dates of clinical influenza diagnoses by primary-health-care providers, whereas dates of laboratory-confirmed influenza A (H1N1) diagnoses were provided by the Norwegian Surveillance System for Communicable Diseases. We obtained dates and types of influenza vaccinations from the Norwegian Imm

SUBMITTER: Gunnes N 

PROVIDER: S-EPMC7192880 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature