Pandemic 2009 influenza A (H1N1) in 71 critically ill pregnant women in California.

We sought to describe the characteristics and clinical management of 71 critically ill pregnant women with pandemic 2009 influenza A (H1N1 [2009 H1N1]). This was a retrospective case series from April 23, 2009, through March 18, 2010, of pregnant women with 2009 H1N1 in intensive care units in California. Among 71 critically ill pregnant women with 2009 H1N1, rapid decline in clinical status was noted with a median duration of 1 day from hospital admission to intensive care unit admission.

Severity of 2009 pandemic influenza A (H1N1) virus infection in pregnant women.

Objective: To examine 2009 H1N1 influenza illness severity and the effect of antiviral treatment on the severity of illness among pregnant women.

Methods: We abstracted medical records from hospitalized pregnant (n=62) and nonpregnant (n=74) women with laboratory-confirmed 2009 H1N1 influenza in New York City, May through June 2009. We compared characteristics of pregnant and nonpregnant women and of severe and moderate influenza illness among pregnant women, with severe defined as illness resulting in intensive care admission or death.