Intravenous Zanamivir for Oseltamivir-Resistant 2009 H1N1 Influenza

Abstract
A 10-year-old girl with acute lymphoblastic leukemia was transferred to our hospital on August 31. The patient required mechanical ventilation for worsening lobar pneumonia, despite the administration of broad-spectrum antibiotics (for details, see the Supplementary Appendix, available with the full text of this letter at NEJM.org). Two weeks earlier, she had completed 5 days of oseltamivir for an upper respiratory tract infection caused by influenza A virus (with positive results on rapid antigen testing). On August 27, she had presented with lobar pneumonia (with negative results on rapid antigen testing).