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Bookmark or Share- Global Influenza Programme - World Health Organization (WHO)Surveillance data for influenza and SARS-CoV-2 are shared with WHO through the Global Influenza Surveillance and Response System (GISRS). Each week, these data are reviewed and analyzed by the Global Influenza Programme to provide a global overview of influenza, SARS-CoV-2, and other respiratory virus activity.
- Influenza (Seasonal) - World Health Organization (WHO)Influenza C virus is detected less frequently and usually causes mild infections, thus does not present public health importance. Influenza D viruses primarily affect cattle and are not known to infect or cause illness in people. Signs and symptoms. Symptoms of influenza usually begin around 2 days after being infected by someone who has the virus.
- History of influenza vaccination - World Health Organization (WHO)Influenza pandemics have occurred throughout history: records document at least 3 well before the 1918–19 pandemic, and another 3 have taken hold after, in 1957–58, 1968–69 and 2009–10. Influenza viruses with pandemic potential regularly emerge, but not all go on to cause a pandemic.
- Influenza seasonal - World Health Organization (WHO)Seasonal influenza is an acute respiratory infection caused by influenza viruses which circulate in all parts of the world. It is characterized by a sudden onset of fever, cough (usually dry), headache, muscle and joint pain, severe malaise (feeling unwell), sore throat and a runny nose. The cough can be severe and can last two or more weeks.
- Influenza: A(H5N1) - World Health Organization (WHO)H5N1 is one of several influenza viruses that causes a highly infectious respiratory disease in birds called avian influenza (or "bird flu"). Infections in mammals, including humans, have also been documented. H5N1 influenza virus infection can cause a range of diseases in humans, from mild to severe and in some cases, it can even be fatal.
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