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.
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.