The Global Influenza Surveillance and Response System (GISRS), led by WHO, is used for the international virological and epidemiological surveillance of human influenza.
Seasonal influenza is a vaccine-preventable disease and annual influenza vaccination is the most effective way to prevent influenza. ECDC continues to emphasise that all Europeans who are recommended to have the influenza vaccine should get vaccinated.
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.
ECDC and World Health Organization (WHO) Regional Office for Europe have jointly developed the European Respiratory Virus Surveillance Summary (ERVISS), an interactive surveillance data dashboard for influenza, respiratory syncytial virus (RSV), and severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) that also features a weekly epidemiological summary.
There are general objectives for integrated surveillance of respiratory viruses in the European Union. These objectives apply to surveillance of influenza, COVID-19, and other respiratory virus infections.
In 2021, 9 of the 23 EU/EEA countries who contributed data reported 47 confirmed congenital syphilis cases. Fourteen countries reported zero cases. For 2020, 10 of the 25 countries that contributed data reported 49 cases.
Compared with the 2021‑2022 influenza season, for sentinel surveillance the number of tested specimens has
doubled, with a 4‑fold increase in influenza detections.