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A model attribution edit summary is Content in this edit is translated from the existing Spanish Wikipedia article at [[:es:Historia natural de la enfermedad]]; see its history for attribution. You may also add the template {{Translated|es|Historia natural de la enfermedad}} to the talk page. For more guidance, see Wikipedia:Translation.
The following is a list of WHO recommended strains for the Northern Hemisphere influenza season. Starting in the 2012–2013 season, the recommendation shifted to include the composition of a quadrivalent influenza vaccine (QIV) that contains both influenza B lineages, alongside a trivalent influenza vaccine (TIV) containing one influenza B lineage.
10 1957–1958 influenza pandemic: Influenza A/H2N2: 1–4 million – 1957–1958 Worldwide 11 Hong Kong flu: Influenza A/H3N2: 1–4 million – 1968–1969 Worldwide 12 1918–1922 Russia typhus epidemic: Typhus: 2–3 million 1–1.6% of Russian population [14] 1918–1922 Russia: 13 Cocoliztli epidemic of 1576: Cocoliztli 2–2.5 million ...
The second wave came with the influx of influenza A viruses, such as H1N1. [3] According to preliminary burden estimates for the 2019–2020 flu season (October 1, 2019 through April 4, 2020) there were between 39 and 56 million flu cases; 18–26 million doctor visits; 410,000 to 740,000 hospitalizations, and between 24,000 and 62,000 deaths.
[8] [10] In 2020, reassortment (genetic "swapping") between these H5-2.3.4.4b viruses and other strains of avian influenza led to the emergence of a H5N1 strain with a H5-2.3.4.4b gene. [8] The virus then spread across Europe, first detected there in the autumn of 2020, before spreading to Africa and Asia . [ 1 ]
This is a timeline of influenza, briefly describing major events such as outbreaks, epidemics, pandemics, discoveries and developments of vaccines. In addition to specific year/period-related events, there is the seasonal flu that kills between 250,000 and 500,000 people every year and has claimed between 340 million and 1 billion human lives ...
Influenza A viruses can occasionally be transmitted from wild birds to other species, causing outbreaks in domestic poultry, and may give rise to human influenza pandemics. [1] [2] The propagation of influenza viruses throughout the world is thought to be in part by bird migrations, though commercial shipments of live bird products might also ...
The Global Influenza Surveillance and Response System (GISRS) is a global network of laboratories that has the purpose to monitor the spread of influenza with the aim to provide the World Health Organization with influenza control information. [1] It was established in 1952 to conduct global influenza surveillance and to inform vaccine ...