Critically ill infants and children with influenza A (H1N1) in pediatric intensive care units in Argentina.

Objective: To determine the epidemiological features, course, and outcomes of critically ill pediatric patients with Influenza A (H1N1) virus.

Design: Prospective cohort of children in pediatric intensive care units (PICUs) due to Influenza A (H1N1) virus infection.

Setting: Seventeen medical-surgical PICUs in tertiary care hospital in Argentina.