Weekly influenza surveillance overview, 13 May 2011 - Week 18

 
 
• Based on influenza activity, the 2010/11 season is now drawing to a close in European countries.
• For week 18/2011, all 26 countries reporting influenza intensity experienced low activity.
• During week 18/2011, only three sentinel samples were positive for influenza virus.
• Two countries reported a total of 11 hospitalised cases with a severe acute respiratory infection, four of which tested positive for influenza virus infection.