Via: The New England Journal of Medicine. Original post published on-line at: http://content.nejm.org/cgi/content/full/NEJMp0910445 on Nov. 25, 2009. Authors: James F. Bishop, M.D., Mary P. Murnane, B.A., and Rhonda Owen, B.Sc. “When the World Health Organization declared a “public health emergency of international concern” on April 25, 2009, after the emergence in Mexico of pandemic influenza
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