Epidemiology of 2009 pandemic influenza a (H1N1) in the United States

  • Jhung M
  • Swerdlow D
  • Olsen S
 et al. 
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In April 2009, the Centers for Disease Control and Prevention confirmed 2 cases of 2009 pandemic influenza A (H1N1) virus infection in children from southern California, marking the beginning of what would be the first influenza pandemic of the twenty-first century. This report describes the epidemiology of the 2009 H1N1 pandemic in the United States, including characterization of cases, fluctuations of disease burden over the course of a year, the age distribution of illness and severe outcomes, and estimation of the overall burden of disease. © 2011 The Author.

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  • M.A. Jhung

  • D. Swerdlow

  • S.J. Olsen

  • D. Jernigan

  • M. Biggerstaff

  • L. Kamimoto

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