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H1N1 influenza A 2009 and pediatric transplantation: Lessons learned and to be learned

Community-acquired respiratory viruses have long been recognized to be important pathogens in children undergoing solid organ and stem cell transplantation. Seasonal epidemics of respiratory syncytial virus, parainfluenza virus, and influenza virus annually result in viral infections in large numbers of pediatric transplant recipients. These infections occur both in those at home as well as in those who acquire them nosocomially with in the hospital. Among these three, influenza is unique in the level of epidemiologic tracking, the widespread availability of effective preventive strategies, and in its ability to constantly undergo change.