2023年10月3日 · However, during periods of low influenza activity or outside of epidemics situations, the infection of other respiratory viruses (e.g. SARS-CoV-2, rhinovirus, respiratory syncytial virus, parainfluenza and adenovirus) can also present as influenza-like illness (ILI), which makes the clinical differentiation of influenza from other pathogens ...

2009年11月27日 · Influenza is usually mild and uncomplicated and most people recover without medical treatment. However infection with influenza may occasionally cause severe disease and death, particularly among the elderly, pregnant women, very young children and persons with certain medical conditions (including chronic heart, lung, kidney, liver, blood or ...

The H1N1 influenza pandemic that swept across the world from 1918 to 1919, sometimes called “the mother of all pandemics”, involved a particularly virulent new strain of the influenza A virus. The first wave of infections in early 1918 resulted in mild illness, but a second wave later that year was more deadly.

Influenza, or the flu, is both a seasonal and a pandemic virus. Every year, mainly during the winter season, seasonal influenza infects as many as 1 billion people. This makes it one of the most common infectious respiratory viruses, after the common cold. Thankfully, the WHO Global Influenza Surveillance and Response System, or GISRS, monitors what viruses are circulating …

Global Influenza Programme We provide Member States with strategic guidance, technical support and coordination of activities essential to make their health systems better prepared against seasonal, zoonotic and pandemic influenza threats to populations and individuals.

Genetic analyses of this virus have shown that it originated from animal influenza viruses and is unrelated to the human seasonal H1N1 viruses that have been in general circulation among people since 1977. After early reports of influenza outbreaks in North America in April 2009, the new influenza virus spread rapidly around the world.

2024年12月20日 · WHO estimates it causes 290 000 to 650 000 deaths yearly due to respiratory diseases alone. Most influenza-related deaths in developed countries occur among people aged 65 and up. Meanwhile, research estimates that developing countries account for 99% of deaths in children under 5 with influenza-related lower respiratory tract infections.

"Pandemic influenza is a significant public health issue that we are unable to prevent or eliminate, given our current technology and knowledge. So much of our work managing the pandemic has to be when it occurs, to impact on health and society," said Dr Zhang. "Seasonal influenza epidemics provide real opportunities to prepare for the next ...

2024年10月23日 · Influenza is an acute viral infection that spreads easily from person to person in any age group and that can cause serious complications in certain risk groups. In addition to seasonal epidemics, influenza pandemics can occur when a new influenza virus subtype emerges or when an animal influenza virus begins to spread among humans.

2024年5月16日 · 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.