Week 14/2021 (05 April–11 April 2021)
- Influenza activity remained at interseasonal levels.
- Of the 948 specimens tested for influenza viruses in week 14/2021, from patients presenting with ILI or ARI symptoms to sentinel primary healthcare sites, two were positive for influenza type A viruses.
- Influenza viruses were detected sporadically from non-sentinel sources (such as hospitals, schools, primary care facilities not involved in sentinel surveillance, or nursing homes and other institutions). Both influenza type A and type B viruses were detected.
- There was 1 hospitalized laboratory-confirmed influenza case from a non-ICU ward reported in week 14/2021.
Of 39 countries and areas reporting on intensity of activity, 33 reported baseline and 6 (Azerbaijan, Estonia, Kosovo (in accordance with UN Security Council resolution 1244 (1999)), Slovakia, Slovenia, Ukraine) reported low intensity for week 14/2021.
- Of 40 countries and areas that reported on geographic spread, 34 reported no activity and 6 (Azerbaijan, Portugal, Slovakia, Ukraine, United Kingdom (England), United Kingdom (Scotland)) reported sporadic spread for week 14/2021.
- 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.
© European Centre for Disease Prevention and Control 2020
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