
A study published online by The New England Journal of Medicine has determined that vaccination for H1N1 influenza during the pandemic of 2009 did not result in an increase in fetal mortality. The researchers performed an analysis of data on 113,331 women in Norway who became pregnant 43 weeks before December 31, 2010. They used the national health registries and data regarding reimbursement of primary care physicians in Norway to assess the effectiveness of the pandemic vaccine in pregnant women and the effect of vaccination or influenza on fetal survival.
