# 6965
In addition to producing its comprehensive Weekly influenza surveillance overview (WISO), the ECDC this season has started releasing a weekly influenza infographic that quickly, and elegantly, conveys the highpoints of the latest surveillance data at a glance.
You’ll find the Week 7 infographic below.
Although only an ocean apart, Europe and North America often report quite different seasonal flu patterns.
- While Influenza B has started to gain a greater share in recent weeks, for most of this 2012-13 flu season North America has been struggling against influenza A, and among which H3N2 has been the dominant strain.
- In Europe the mix between influenza A & B has been about even - and since week 52/2012 - Europe has reported an increasing proportion of H1N1pdm09 over seasonal H3N2.
A more complete surveillance analysis may be read at the link(s) below:
Substantial influenza activity in Europe but some signs of decline: ECDC weekly monitoring
22 Feb 2013
ECDC
During week 7, 19 of the 29 countries reporting indicated high/medium-intensity transmission and wide geographic spread of influenza. Eleven countries reported increasing trends, and ten countries reported decreasing trends, compared to thirteen countries reporting increasing trends and six reporting decreasing trends in the previous week (week 6).
Virological surveillance shows that the proportion of influenza-positive cases among sentinel specimens continues to be high (52%) but continued to decrease, as first observed in the previous week.
Since week 40/2012, an even distribution of influenza virus types has been observed, 50% each for type A and type B viruses. Among influenza A viruses, an increasing proportion of A(H1)pdm09 over A(H3) has been reported since week 52/2012.
On 8 February 2013, ECDC published its annual risk assessment for seasonal influenza 2012-2013 based on data up to week 03/2013.
Resources:
- Weekly influenza surveillance overview, week 7/2013
- Risk assessment: Seasonal influenza 2012/13 in Europe (EU/EEA countries)
- Influenza in Europe at a glance: weekly infographic (.jpg)
- Watch ECDC video on seasonal influenza
- Read weekly influenza surveillance reports
- View influenza surveillance maps
- Learn more about influenza on ECDC website
