Primary care data

Syndromic surveillance data

For the 2019-20 influenza season, ILI thresholds were defined for 35 Member States or areas and ARI thresholds for 17 Member States or areas.

For week 03/2020, 17 (52%) of the 33 Member States and areas that reported on influenza-like illness (ILI) and 4 (25%) of the 16 Member States and areas that reported on acute respiratory infection (ARI), registered activities above their baseline levels.

Influenza activity

Of 48 Member States and areas that reported on the intensity indicator, 14 reported activity at baseline levels (across the Region), 25 reported low (across the Region), 8 reported medium (across the Region), and 1 reported high (Israel) intensity for week 03/2020.

Of 48 Member States and areas that reported on geographic spread, 2 reported no activity (Azerbaijan and Tajikistan), 10 reported sporadic spread (across the Region), 6 reported local spread (in eastern, northern and western areas), 6 reported regional spread (in eastern, southern and western areas) and 24 reported widespread (across the Region) geographic activity.

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

For week 03/2020, 921 (45%) of 2 066 sentinel specimens tested positive for an influenza virus; 72% were type A and 28% were type B. Of 562 subtyped A viruses, 76% were A(H1N1)pdm09 and 24% were A(H3N2). Of 83 type B viruses ascribed to a lineage, all were B/Victoria lineage.

Of 33 Member States or areas across the Region that each tested at least 10 sentinel specimens in week 03/2020, 11 reported rates of influenza virus detections of 50% and above.

For the season to date, more influenza type A (n=4 091, 68%) than type B (n=1 955, 32%) viruses have been detected. Of 3 890 subtyped A viruses, 2 120 (54%) were A(H1N1)pdm09 and 1 770 (46%) were A(H3N2). Of 561 influenza type B viruses ascribed to a lineage, 98% were B/Victoria and 2% were B/Yamagata lineage.

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

Influenzanet data

Influenzanet is a European wide initiative providing surveillance of influenza-like illness (ILI) in the general population using citizens self-reported symptoms. For week 03/2020, one country (Ireland) reported no ILI cases, six countries reported from 10 to 25 ILI cases
per 1 000 active participants and one country (Denmark) reported approximately 30 ILI cases per 1 000 active participants.

Based on this system, activity was low in all eight reporting countries; activity is below the first quantile of influenza incidence for this time in previous years.