Weekly influenza surveillance overview March 30 2012 - Week 12
The weekly influenza surveillance overview is a collection of timely and relevant information regarding influenza activity in Europe. It provides key statistical data on a vareity of issues including the following: sentinel surveillance of influenza-like illness (ILI) and acute respiratory illness (ARI), virological surveillance, hospital surveillance of severe acute respiratory infection (SARI), mortality surveillance and qualitative reporting. An up-to-date report is available on Fridays.
The 2011–2012 influenza season started late and has been without any clear geographic progression. During week 12/2012, medium or low intensity was reported in all 28 reporting countries, with decreasing trends in 21 countries. Of those, 14 countries reported decreasing trends for two consecutive weeks, suggesting that their influenza seasons have peaked.
Virological surveillance for the period shows that of 940 sentinel specimens tested, 42.9% were positive for influenza virus. This proportion was unchanged compared to week 11 after declining steadily from a peak of 58% in week 8. Of the positive sentinel specimens, 75.2% were type A and 24.8% type B. The proportion of influenza B viruses has continued to increase.
Since week 40/2011, a total of 1 513 SARI cases, including 79 fatalities, have been reported by seven countries. Of these cases, most were influenza-related.
No resistance to neuraminidase inhibitors (oseltamivir and zanamivir) has been reported so far this season.
Influenza virus characterisation Summary Europe, April 2021
12 May 2021 - ECDC’s influenza virus characterisation reports are published periodically and give an overview of circulating influenza viruses. They provide details on the current vaccine strains, summarise the development of the viruses since the last report, and closely follow the main developments for the ongoing influenza season. Virus characterisation reports are primarily intended for influenza virologists and epidemiologists.
Influenza virus characterisation - Summary Europe, March 2021
21 Apr 2021 - This is the fifth report for the 2020-2021 influenza season. As of week 12/2021, only 758 influenza detections across the WHO European Region had been reported to The European Surveillance System (TESSy); 50% type A viruses, with A(H3N2) and A(H1N1)pdm09 being equally represented, and 50% type B viruses, with only 12 having been ascribed to a lineage, 10 B/Victoria and two B/Yamagata.