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Equine influenza (horse flu) is the disease caused by strains of influenza A that are enzootic in horse species. Equine influenza occurs globally, previously caused by two main strains of virus: equine-1 ( H7N7 ) and equine-2 ( H3N8 ). [ 1 ]
Viruses that are shed for long periods of time after a horse gets better are much harder to control. Horses tend to be most infectious (i.e. shedding the most virus) in the first 24–48 hours after they develop a fever, but they can shed the virus for up to 7–10 days after their signs of illness disappear. [14]
Also known as "horse flu" and "A1 influenza", the rapid outbreak was of the Influenza A virus strain of subtype H3N8. While the virus is highly contagious, it rarely kills adult horses but the performance of thoroughbred racing horses can be affected for several weeks. It can be fatal to young foals and debilitated horses.
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Annually, about 3 to 5 million cases of severe illness and 290,000 to 650,000 deaths from seasonal flu occur worldwide. [10] A/H3N2 is one of the prevalent subtypes of flu which contribute to seasonal flu outbreaks, and a strain of A/H3N2 is usually included in the biannual reformulation of the flu vaccine. [11]
The Vietnamese Wikipedia initially went online in November 2002, with a front page and an article about the Internet Society.The project received little attention and did not begin to receive significant contributions until it was "restarted" in October 2003 [3] and the newer, Unicode-capable MediaWiki software was installed soon after.
A person in Vietnam died of H5N1 infection around the same time, clade unknown. [ 51 ] In April 2024 the FAO reported that recent reassortment in the Greater Mekong Subregion has produced viruses that carry internal genes from the 2.3.4.4b lineage but the H5 gene from the older 2.3.2.1c lineage.
Avian influenza virus H3N2 is endemic in pigs ("swine flu") in China and has been detected in pigs in Vietnam, increasing fears of the emergence of new variant strains. Health experts say pigs can carry human influenza viruses, which can combine (i.e. exchange homologous genome sub-units by genetic reassortment ) with H5N1 , passing genes and ...