Weeks 21–25/2016 (23 May–26 June 2016)

  • Influenza activity in the WHO European Region has returned to low levels, with all countries reporting low intensity since week 23/2016.
  • Influenza viruses were detected sporadically both in sentinel and non-sentinel specimens, with influenza B viruses dominating.
  • Data from the 18 countries or regions reporting to the European monitoring of excess mortality for public health action (EuroMOMO) project indicate that all-cause mortality has been within the normal range in the reporting countries during the past weeks.


  • Most of the viruses genetically characterized during this season have been similar to those recommended for inclusion in the trivalent or quadrivalent vaccines for the 2015–2016 influenza season in the northern hemisphere (see the May characterization report).
  • Recommendations on the composition of the seasonal influenza vaccines for the 2016–2017 season in the northern hemisphere call for the replacement of the A(H3N2) component with a more recent virus and the inclusion of a B/Victoria-lineage virus in trivalent vaccines.


Additional information on influenza in the world is available from WHO’s global updates.

Note: this is the first bulletin of the summer season. Weekly online reporting for the next season will start in week 40/2016. During summer months, weekly reporting to the European Surveillance System (TESSy) will continue, next bulletins will be issued: 5 August, 9 September and 7 October.



Influenza intensity, spread and dominant virus type/subtype

Influenza virus detections in the region