Weekly influenza surveillance overview, March 15, 2013 - Week 10

Surveillance report

15 March 2013

The weekly/bi-weekly influenza surveillance overview is a collection of timely and relevant information regarding influenza activity in Europe. It provides key statistical data on a variety of issues including the following: sentinel surveillance of influenza-like illness and acute respiratory illness; virological surveillance; hospitalised laboratory-confirmed influenza cases; mortality surveillance and qualitative reporting. An up-to-date report is available on Fridays.

Executive Summary

During week 10, 18 of the 27 countries reporting indicated wide geographic spread on influenza, 16 of which also reported high/medium-intensity transmission, states the Weekly influenza surveillance overview. Only one country reported an increasing trend, and 19 countries reported a decreasing trend in influenza activity.

Virological surveillance shows that the overall proportion of influenza-positive cases among sentinel specimens continues to remain high (54%), but it has decreased from the peak observed in early February.

Since week 40/2012, 48% of sentinel specimens positive for influenza virus have been of type A and 52% of type B. The proportion of A(H1)pdm09 has remained at about 60% of subtyped type A viruses.

ECDC published its annual risk assessment for seasonal influenza 2012-13 in early February based on data up to week 3/2013.

Publication file

influenza-weekly-surveillance-overview-15-mar-2013.pdf

English (1 MB - PDF)

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