Primary care data

Syndromic surveillance data

 

Of the countries and areas in which thresholds for ILI activity are defined, countries in eastern (n=3; Azerbaijan, Kyrgyzstan, Russian Federation), northern (n=2; Estonia, Ireland), southern (n=1; Serbia) and western (n=5; Austria, Belgium, Hungary, Luxembourg, Switzerland) areas of the European Region reported activity above baseline levels. 

Of the countries and areas in which thresholds for ARI activity are defined, countries in eastern (n=2; Kyrgyzstan, Russian Federation), northern (n=2; Estonia, Latvia) and western (n=1; Czechia) areas of the European Region reported activity above baseline levels
 

Please note: 

Assessment of the syndromic surveillance data of ILI or ARI rates might be driven by respiratory infections other than influenza virus, including SARS-CoV-2, leading to observed increases in the absence of influenza virus detections. The thresholds mentioned are based on the MEM method and based on historical ILI/ARI data.

 

 

Viruses detected in sentinel-source specimens (ILI and ARI)

For week 47/2021, 26 (2%) of 1 471 sentinel specimens tested positive for an influenza virus; 24 (92%) were type A and 2 (8%) were type B. Of 14 subtyped A viruses, 100% were A(H3). Of 22 countries or areas across the Region that each tested at least 10 sentinel specimens for week 47/2021, only 1 reported a rate of influenza virus detections above 10%: Kosovo (in accordance with UN Security Council Resolution 1244 (1999)) (43%).  


For the season to date, 139 (1%) of 10 461 sentinel specimens tested positive for an influenza virus. More influenza type A (n=133, 96%) than type B (n=6, 4%) viruses have been detected. Of 99 subtyped A viruses, 98 (99%) were A(H3) and 1 (1%) was A(H1)pdm09. No influenza type B viruses were ascribed to a lineage. 

 

 

Details of the distribution of viruses detected in non-sentinel-source specimens are presented in the Virus characteristics section.

 

 

External data sources

Influenzanet collects weekly data on symptoms in the general community from different participating countries across the EU/EEA. Please refer to the website for additional information for this week.