Influenzanet is a system to monitor the activity of influenza-like-illness (ILI) with the aid of volunteers via the internet

Epiwork Logo
Developing the framework for an epidemic forecast infrastructure.

The Seventh Framework Programme (FP7) bundles all research-related EU initiatives.

7th Framework Logo
Participating countries and volunteers:

The Netherlands 0
Belgium 0
Portugal 1590
Italy 4840
Great Britain 0
Sweden 3559
Germany 0
Austria 0
Switzerland 1352
France 0
Spain 1030
Ireland 355
Denmark 3199
InfluenzaNet is a system to monitor the activity of influenza-like-illness (ILI) with the aid of volunteers via the internet. It has been operational in The Netherlands and Belgium (since 2003), Portugal (since 2005) and Italy (since 2008), and the current objective is to implement InfluenzaNet in more European countries.

In contrast with the traditional system of sentinel networks of mainly primary care physicians coordinated by the European Influenza Surveillance Scheme (EISS), InfluenzaNet obtains its data directly from the population. This creates a fast and flexible monitoring system whose uniformity allows for direct comparison of ILI rates between countries.

Any resident of a country where InfluenzaNet is implemented can participate by completing an online application form, which contains various medical, geographic and behavioural questions. Participants are reminded weekly to report any symptoms they have experienced since their last visit. The incidence of ILI is determined on the basis of a uniform case definition.

Hide this information

Welcome to Flusurvey 2018-19

Flusurvey is an online survey that monitors trends of flu like illness in the community. Any member of the UK public can register onto the platform to report flu like symptoms they may experience during the winter months. This data will be used by researchers at Public Health England and London School of Hygiene and Tropical Medicine to monitor flu trends in the UK. 

The UK Flusurvey was launched on 16th July 2009, during the swine flu pandemic, and is part of a Europe-wide initiative to monitor influenza-like illness (ILI) activity. We currently have more than 7,500 people, from all over the UK, participating  in this survey and would like to increase this number to make our interpretations more meaningful. If you have participated in previous years please do so again this year.

If you are new to this site please click on the 'Join the Survey' box on the right.

Flu Like Illness Heatmap

Below see the amount of influenza like illness (ILI) reported around the UK right now.  The map shows a gradient from no reported ILI (blue) to very high ILI (red). Map updated every three minutes.

ILI case definition

Based on ECDC recommendation, ILI is defined as

Sudden onset of symptoms with

at least one of Fever (chills); Malaise; Headache; Muscle pain and

at least one of Cough; Sore throat; Shortness of breath