About the network
The main objectives of ERLI-Net are to carry out virological surveillance of human influenza and to ensure that data are shared through the European Influenza Surveillance Network (EISN) reporting mechanisms in a timely manner.
Influenza laboratory quality control
In accordance with the Key Tasks, ERLI-Net laboratories should participate in external quality assurance (EQA) schemes. EQA panels are distributed by both ERLI-Net and the WHO.
The clinical surveillance of influenza in the European Influenza Surveillance Network (EISN) is generally based on reports made by sentinel general practitioners. Some of the sentinel surveillance systems also include paediatricians and physicians with other specialisations. The physicians usually represent 1-5% of physicians working in the country or region.
Indicators of influenza activity
The levels of influenza activity in European countries reported by EISN members during the influenza season are based on three assessments: An indicator of the overall intensity of influenza activity in the country, An indicator of the geographical spread of influenza in the country, An indicator of trend in ILI/ARI sentinel consultations in the country compared to the previous week.