Severe 2009 H1N1 Influenza in Pregnant and Postpartum Women in California

ABSTRACTPregnant women with 2009 pandemic influenza A (H1N1) appear to be at increased risk of severe disease. Over a span of 4 months in 2009, a total of 10% of the 1088 patients identified with 2009 H1N1 influenza who died or were hospitalized for this infection were pregnant. The frequency of hos