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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."
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 ...
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 throughout history.
The main virus involved in the global outbreak is as H5N1 clade 2.3.4.4b, genetic diversification of which with other clades (such as 2.3.2.1c) has seen an evolution in the ability to cause significant outbreaks in a broader range of species, mammals included. [104] [105] [106]
Dairy industry experts say the virus entered California after local cows were shipped to another state and then returned to California.
When, where and how the H5N1 bird flu virus may evolve and its capacity to spark a pandemic is hard to predict — in part, some researchers say, because of federal restrictions on gain-of ...
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 ...
GENEVA (Reuters) -There is a risk that the H5N1 bird flu virus, present in many wild birds, may infect cows in countries beyond the United States as they migrate, a World Health Organization ...