Weekly influenza overview

Week 2/2022 (10 – 16 January 2022)

 

  • Albania, Israel, Kazakhstan, North Macedonia, Norway, Russian Federation, Sweden and Serbia reported widespread influenza activity and/or medium influenza intensity.
  • 6% of all sentinel primary care specimens from patients presenting with ILI or ARI symptoms tested positive for influenza virus, a decrease from 13% in week 1/2022.
  • Six countries reported seasonal influenza activity at or above 10% positivity in sentinel primary care: Armenia (56%), Serbia (22%), Estonia (15%), France (13%), Georgia (12%) and Russian Federation (10%).
  • Hospitalized cases with confirmed influenza virus infection were reported from intensive care units (7 type A viruses and 1 type B), other wards (4 type A viruses) and SARI surveillance (25 type A viruses).
  • Both influenza type A and type B viruses were detected with A(H3) viruses being dominant across all monitoring systems.

 

 

Qualitative indicators

 

For week 2/2022, of 35 countries and areas reporting on intensity of influenza activity, 20 reported baseline-intensity (across the Region), 12 reported low-intensity (across the Region) and 3 reported medium-intensity (Kazakhstan, North Macedonia and Serbia).

 

Of 35 countries and areas reporting on geographic spread of influenza viruses, 11 reported no activity (across the Region), 12 reported sporadic spread (across the Region), 2 reported local spread (Estonia and Germany), 5 reported regional spread (France, Kyrgyzstan, North Macedonia, Serbia and Ukraine) and 5 reported widespread activity (Albania, Israel, Norway, Russian Federation and Sweden).

 

 

Please note: 

  • Assessment of the intensity of activity indicator includes consideration of ILI or ARI rates. These ILI or ARI rates might be driven by respiratory infections other than influenza, including SARS-CoV-2, leading to observed increases in the absence of influenza virus detections.
  • Assessment of intensity and geographic spread indicators includes consideration of sentinel and non-sentinel influenza virus detection data. Non-sentinel influenza virus detections, often higher, might translate into reporting of elevated geographic spread even in the absence of sentinel detections. 

  

* 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.

© World Health Organization 2021
© European Centre for Disease Prevention and Control 2021
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The designation employed and the presentation of this material do not imply the expression of any opinion whatsoever on the part of the Secretariat of the World Health Organization concerning the legal status of any country, territory, city or area or of its authorities, or concerning the delimitation of its frontiers and boundaries.
* 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.
Administrative boundaries: © EuroGeographics, © UN-FAO.