Epidemic Influenza — Responding to the Expected but Unpredictable

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New England Journal of Medicine
February 14, 2013  Vol. 368 No. 7
http://content.nejm.org/current.shtml

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Epidemic Influenza — Responding to the Expected but Unpredictable
Joseph Bresee, M.D., and Frederick G. Hayden, M.D.
N Engl J Med 2013; 368:589-592 February 14, 2013 DOI: 10.1056/NEJMp1300375

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The number of U.S. cases of influenza-like illness has already exceeded the baseline for 7 weeks this season, and related hospitalizations and deaths are increasing. The causes of variability in the timing and severity of influenza epidemics are incompletely understood…