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3 paź 2023 · Key facts. There are around a billion cases of seasonal influenza annually, including 3–5 million cases of severe illness. It causes 290 000 to 650 000 respiratory deaths annually. Ninety-nine percent of deaths in children under 5 years of age with influenza-related lower respiratory tract infections are in developing countries.
Influenza viruses not only cause high levels of morbidity and mortality seasonally each year, but also present a significant global health security threat. It is critical to understand the pathogenesis and epidemiology of influenza, and to recognize, investigate and manage patients appropriately.
Annual seasonal influenza epidemics of variable severity caused by influenza A and B virus infections result in substantial disease burden worldwide. Seasonal influenza virus circulation declined markedly in 2020–21 after SARS-CoV-2 emerged but increased in 2021–22.
Key Insights on Influenza. Seasonal flu kills hundreds of thousands of people worldwide each year. In serious cases, the flu can lead to health complications such as pneumonia, strokes, and heart attacks, which can be deadly. In total, researchers estimate that the flu causes 400,000 respiratory deaths and 300,000 cardiovascular deaths each year.1.
The weekly surveillance of seasonal influenza is complemented by epidemic intelligence activities at ECDC, which encompass monitoring of official and unofficial sources on outbreaks and other influenza-related developments.
Global Influenza Programme. FluNet is a global web-based tool for influenza virological surveillance first launched in 1997. The virological data entered into FluNet, e.g. number of influenza viruses detected by subtype, are critical for tracking the movement of viruses globally and interpreting the epidemiological data.
28 cze 2018 · Influenza is an infectious respiratory disease that, in humans, is caused by influenza A and influenza B viruses. Typically characterized by annual seasonal epidemics, sporadic pandemic...
