Background 
Online First June 29, 2009, from the New England Journal of Medicine(2)
Online First from NEJM — Articles on H1N1 (Swine) Influenza. Published June 29, 2009.
Online First May 27, 2009, from the New England Journal of Medicine
Online First from NEJM — Articles on H1N1 (Swine) Influenza. Published May 27, 2009.
From the Archive
These articles from our archive include descriptions of avian influenza A, the 1976 swine flu epidemic, the 1918-1919 influenza epidemic, and even the influenza epidemic of 1837. Also included are review articles on the management of seasonal influenza.
The Sudden Birth of H1N1 “Swine” Flu: What Does the Future Hold?
The past and future flu virus … In recent weeks, an international outbreak of illness has occurred; it is caused by a new strain of influenza virus (2009 A/H1N1) that contains a combination of swine, avian, and human influenza virus genes. In this post, Anthony L. Komaroff, MD, provides some additional background information.