Primary care data

Of countries with thresholds based on syndromic surveillance data for influenza-like illness (ILI) and/or acute respiratory infection (ARI), all reported respiratory infections to be at baseline levels.

Influenza activity

All 29 Member States and areas reporting on intensity for at least one week between weeks 26/2018 and 30/2018 reported low intensity.

Of the 29 Member States and areas reporting on geographic spread for at least one week from week 31/2018 through week 35/2018, most reported no activity, a few (4–5 countries) sporadic activity and one local activity.

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

For weeks 21–35/2018, 8 (0.5%) of 1 462 sentinel specimens tested positive for an influenza virus. Of the 7 influenza type A viruses, 5 were subtyped, 3 were A(H1N1)pdm09 and 2 were A(H3N2). The single influenza B virus was not ascribed to a lineage.

For weeks 31-35/2018, only one influenza virus A(H1N1)pdm09 was detected.

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