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3 de may. de 2024 · Influenza is typically characterized by seasonal epidemics and sporadic pandemics. Most of the burden of influenza is a result of flu seasons caused by IAV and IBV. Among IAV subtypes, H1N1 and H3N2 circulate in humans and are responsible for seasonal influenza.
- Influenza viruses
- >290,000–650,000 deaths per year
3 de may. de 2024 · Influenza A H1N1, virus that is best known for causing widespread outbreaks, including epidemics and pandemics, of acute upper or lower respiratory tract infection. The influenza A H1N1 virus is a member of the family Orthomyxoviridae (a group of RNA viruses). Type A is one of the three major types.
- The Editors of Encyclopaedia Britannica
Hace 2 días · The 1918 Spanish flu was the first of three flu pandemics caused by H1N1 influenza A virus; the most recent one was the 2009 swine flu pandemic. The 1977 Russian flu was also caused by H1N1 virus.
- February 1918 – April 1920
- Worldwide
- 25–50 million (generally accepted), other estimates range from 17 to 100 million
- Influenza
16 de abr. de 2024 · La vacuna contiene las cepas de influenza A (H1N1), A (H3N2) y tipo B (Victoria) y al aplicarse, el organismo de la persona genera anticuerpos para defenderse de la infección por influenza, evitar casos graves y la muerte.
19 de abr. de 2024 · Seasonal influenza activity continues to decline in most areas of the country. CDC continues to recommend vaccination as long as flu viruses are spreading. There are antiviral drugs to treat flu illness. Flu Report.
15 de abr. de 2024 · influenza pandemic (H1N1) of 2009, the first major influenza outbreak in the 21st century, noted for its rapid global spread, which was facilitated by an unusually high degree of viral contagiousness. Global dissemination of the virus was further expedited by the unprecedented rates of passenger travel that characterize the modern era.
Hace 3 días · The chosen strains are the H1N1, H3N2, and Type-B strains thought most likely to cause significant human suffering in the coming season. Starting with the 2012–2013 Northern Hemisphere influenza season (coincident with the approval of quadrivalent influenza vaccines), the WHO has also recommended a 2nd B-strain for use in ...
