Primary care data
Syndromic surveillance data
For week 11/2019, of the 32 Member States reporting influenza-like illness (ILI) thresholds, 11 (34%) reported ILI activity above baseline levels.
These include countries in eastern areas of the European Region (n=2; Republic of Moldova, Russian Federation), northern areas (n=4; Estonia, Latvia, Lithuania, Norway), southern areas (n=1; Montenegro) and western areas (n=4; Belgium, Luxembourg, Netherlands, Switzerland).
Of the 18 Member States reporting acute respiratory infection (ARI) thresholds, 4 (22%) reported ARI above baseline levels. These were countries in the eastern (n=2; Armenia, Russian Federation) and northern (n=2; Estonia, Lithuania) areas of the European Region.
For week 11/2019, of 47 Member States and areas reporting on intensity, 8 reported baseline (eastern, northern, western areas), 26 reported low (across the region) and 13 reported medium (across the region) intensity.
Of 47 Member States and areas reporting on geographic spread, 2 reported no activity (Bulgaria, Tajikistan), 8 reported sporadic cases (across the region), 9 reported local spread (across the region), 12 reported regional spread (in eastern, southern, western areas) and 16 reported widespread activity (in northern, southern, western areas).
Viruses detected in sentinel-source specimens (ILI and ARI)
For week 11/2019, 398 (34.1%) of 1 167 sentinel specimens tested positive for an influenza virus; 391 were type A and 7 were type B. Of 309 subtyped A viruses, 39.5% were A(H1N1)pdm09 and 60.5% were A(H3N2) (Table).
Of 28 countries or areas across the region that each tested at least 10 sentinel specimens in week 11/2019, 14 reported a proportion of influenza virus detections above 30% (median 48.5%; range 33.3% – 70.6%).
For the season to date, almost all viruses detected were influenza type A (n=19 377, 99.1%) with type B accounting for only 0.9% of detections (n=180). Of 14 910 subtyped A viruses, 8 361 (56.1%) were A(H1N1)pdm09 and 6 549 (43.9%) were A(H3N2). Of 55 influenza type B viruses ascribed to a lineage, 85.5% were B/Yamagata (69.4% of type B viruses were reported without a lineage) (Table).
Details of the distribution of viruses detected in non-sentinel-source specimens can be found in the Virus characteristics section.