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The presence of highly pathogenic (deadly) H5N1 around the world in both birds in the wild (swans, magpies, ducks, geese, pigeons, eagles, etc.) and in chickens and turkeys on farms has been demonstrated in millions of cases with the virus isolate actually sequenced in hundreds of cases yielding definitive proof of the evolution of this strain ...
In December, a HPAI H5N1 subtype of clade 2.3.4.4b was found in a captive Asian black bear and in wild and captive birds in a wildlife park in France. [17] A human case of H5N1 was reported in the U.S. in April, "though this detection may have been the result of contamination of the nasal passages with the virus rather than actual infection."
While prior H5N1 strains have been known, they were significantly different from the current H5N1 strain on a genetic level, making the global spread of this new strain unprecedented. The current H5N1 strain is a fast-mutating, highly pathogenic avian influenza virus (HPAI) found in multiple bird species. It is both epizootic (an epidemic in ...
The deaths, at a farm near the region's capital of Hohhot, were due to the H5N1 strain, the Xinhua news agency said. Locations of 2005 outbreaks in Croatia. October 26, 2005 Croatia announced H5N1 strain was found in dead swans. [14] [15] October 31, 2005 Russia confirmed previously suspected H5N1 bird flu in ten rural communities across Russia ...
Dairy industry experts say the virus entered California after local cows were shipped to another state and then returned to California.
Influenza A/H5N1 was first recorded in a small outbreak among poultry in Scotland [74] in 1959, with numerous outbreaks subsequently in every continent. [75] The first known transmission of A/H5N1 to a human occurred in Hong Kong in 1997, when there was an outbreak of 18 human cases resulting in 6 deaths. It was determined that all the infected ...
Scientists also know a lot more about H5N1 bird flu than they did the SARS-CoV-2 virus, and the US has been preparing for the threat of a new flu outbreak for a long time. Still, the virus is ...
According to WHO, the world has been at phase 3 on the scale, meaning a new influenza virus subtype is causing disease in humans, but has not yet spread efficiently and sustainably among humans. [29] So far, H5N1 infections in humans are attributed to bird-to-human transmission of the virus in most cases.