Objective: To report an 11-year-old girl with encephalitis-associated pandemic influenza A (H1N1) 2009 virus infection.
Clinical Presentation And Intervention: An 11-year-old girl presented with a 6-day history of influenza-like illness followed by an altered mental status for 1 day. She tested positive for pandemic influenza A (H1N1) 2009 virus by PCR of her nasal swab.