Primary care data

Syndromic surveillance data

Of those Member States for which thresholds for influenza-like illness (ILI) activity are defined, only the United Kingdom (Northern Ireland) reported intensity above their baseline level.

Of those Member States for which thresholds for acute-respiratory infection (ARI) activity are defined, only Armenia reported intensity above their baseline level.

Influenza activity

Of 47 Member States and areas reporting on intensity, 41 reported baseline, 5 (Armenia, Azerbaijan, Estonia, Georgia and Lithuania) reported low intensity, and 1 (the United Kingdom (Northern Ireland)) reported medium intensity for week 48/2019. Of 46 Member States and areas reporting on geographic spread, 12 reported no activity, 22 reported sporadic cases, 9 reported local spread (across the Region), 1 (the United Kingdom (England)) reported regional spread and 2 (Finland and Portugal) reported widespread activity.

Viruses detected in sentinel-source specimens (ILI and ARI)

For week 48/2019, 140 (13.8%) of 1 016 sentinel specimens tested positive for influenza viruses; 71% were type A and 29% were type B. Of 90 subtyped A viruses, 39% were A(H1N1)pdm09 and 61% were A(H3N2). Of 13 type B viruses ascribed to a lineage, 12 were B/Victoria and 1 was B/Yamagata.

Of 23 Member States and areas across the Region that each tested at least 10 sentinel specimens in week 48/2019, 12 reported a positivity rate above 10%.

For the season overall, more influenza type A (66%) than type B (34%) viruses have been detected. Of 340 subtyped A viruses, 37% were A(H1N1)pdm09 and 63% were A(H3N2). Of 56 influenza type B viruses ascribed to a lineage, 96% were B/Victoria and 4% were B/Yamagata.

Details of the distribution of viruses detected in non-sentinel-source specimens can be found in the Virus characteristics section.