Syndromic surveillance data
Of the countries and areas in which thresholds for ILI activity are defined, countries in eastern (n=3; Kyrgyzstan, Russian Federation and Tajikistan), northern (n=3; Denmark, Estonia and Ireland), southern (n=2; Israel and Serbia) and western (n=4; Austria, Belgium, Luxembourg and 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=3; Kazakhstan, Kyrgyzstan and Russian Federation), northern (n=2; Estonia and Latvia) and southern (n=1; Albania) areas of the European Region reported activity above baseline levels.
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 02/2022, 87 (6%) of 1 395 sentinel specimens tested positive for an influenza virus; 86 (99%) were type A and 1 was type B. Of 65 subtyped A viruses, 92% were A(H3) and 8% A(H1)pdm09. Of 23 countries or areas across the Region that each tested at least 10 sentinel specimens in week 2/2022, 6 reported rates of influenza virus detections at or above 10% (median 14%; range 10% - 56%): Armenia (56%), Serbia (22%), Estonia (15%), France (13%), Georgia (12%) and Russian Federation (10%).
For the season to date, 1 668 (7%) of 24 884 sentinel specimens tested positive for an influenza virus. More influenza type A (n=1 644, 99%) than type B (n=24, 1%) viruses have been detected. Of 1 131 subtyped A viruses, 1 065 (94%) were A(H3) and 66 (6%) were A(H1)pdm09. Of 5 influenza type B viruses ascribed to a lineage, all were B/Victoria (79% of type B viruses were reported without 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.
* The administrative boundaries include spatial feature for Kosovo, this designation being without prejudice to position on status, and is in line with United Nations Security Council Resolution 1244 (1999) and the International Court of Justice Opinion on the Kosovo Declaration of Independence.