Weekly influenza surveillance overview, weeks 21-35, 2014

Surveillance report
Time period covered: Weeks 21-35/2014

Main surveillance developments during weeks 21–35/2014 ( 19 May – 31 August 2014 )

Executive summary

For weeks 21-35/2014:

  • Low intensity was reported by all countries submitting reports (15 to 19 depending on the week). Local or sporadic activity was reported by eight countries.
  • Of 330 sentinel specimens tested across 14 countries, 10 were positive for influenza virus. Eight were influenza A viruses and two were type B.
  • Nine hospitalised, laboratory-confirmed influenza cases were reported by two countries; six of these cases were admitted to intensive care units.

Overall, influenza activity and circulation of influenza viruses in reporting countries was low.