Weekly influenza surveillance overview January 7, 2011 - Week 52
Generally, reporting of influenza has been less complete over weeks 51 and 52 due to the holiday period, which reduces consulting rates and reporting to national centres and subsequently onto ECDC. Nevertheless, in week 52/2010, 15 of the 25 countries reported increasing trends of influenza activity.
Weekly influenza surveillance overview, March 23, 2012 - Week 11
During week 11/2012, medium intensity was reported in 16 countries, high intensity in one country, and decreasing trends in 15 countries.