The summaries of global surveillance are based on data gathered through global and regional data sharing platforms, and direct reports from Member States.
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Regular influenza updates
24 May 2013
Overview of influenza activity globally
Review of the 2012/2013 winter influenza season, northern hemisphere
This report summarizes the chronology, epidemiology and virology of the winter influenza season in the temperate regions of the northern hemisphere. The review covers influenza activity data collected from August 2012 until the end of April 2013.