Primary care data
Syndromic surveillance data
For week 1/2019, of those Member States in which thresholds for influenza-like illness (ILI) activity are defined, countries in northern (n=55; Estonia, Ireland, Latvia, Lithuania and United Kingdom (England and Wales), southern (n=3; Greece, Israel and Italy) and western (n=1; Portugal) sectors of the European region reported activity above baseline levels.
Of those Member States and areas in which thresholds for acute respiratory infection (ARI) activity are defined, all reported activity within baseline levels.
Of 43 Member States and areas reporting on influenza activity, 12 reported baseline (across the region), 28 low (across the region), 2 medium (Portugal and United Kingdom (England)) and 1 high (Malta) intensity for week 1/2019.
Of 42 Member States and areas reporting on geographic spread, 5 reported no activity (Azerbaijan, Bulgaria, Luxembourg, The Former Yugoslav Republic of Macedonia and Kosovo), 15 sporadic spread (across the region), 8 local spread (in northern, southern and western areas), 5 regional spread (Israel, the Netherlands, Republic of Moldova, Spain and Ukraine) and 9 widespread (in northern, southern and western areas) activity for week 1/2019.
Viruses detected in sentinel-source specimens (ILI and ARI)
For week 1/2019, 605 (44.6%) of 1 356 sentinel specimens tested positive for an influenza virus; 98.5% were type A and 9 were type B. Of 346 subtyped A viruses, 52% were A(H3N2) and 48% were A(H1N1)pdm09 (Table). Of 5 type B viruses ascribed to a lineage, 1 was Victoria lineage and 4 were Yamagata lineage (Table).
Of 26 Member States or areas across the region that each tested at least 10 sentinel specimens in week 01/2019, 16 reported rates of influenza virus detections in the range of 30% to 75.0% (median 49.7%).
For the season to date, more influenza type A (n=1 941, 98.4%) than type B (n=32, 1.6%) viruses have been detected. Of 1 499 subtyped A viruses, 800 (53.4%) were A(H1N1)pdm09 and 699 (46.6%) were A(H3N2). Of 12 influenza type B viruses ascribed to a lineage, 9 were B/Yamagata and 3 were B/Victoria; 20 (62.5%) 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.