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H5N1 influenza virus is a type of influenza A virus which mostly infects birds. H5N1 flu is a concern because its global spread may constitute a pandemic threat. The yardstick for human mortality from H5N1 is the case-fatality rate (CFR); the ratio of the number of confirmed human deaths resulting from infection of H5N1 to the number of those confirmed cases of infection with the virus.
[26] [27] [28] Further sequencing determined that at least one of the two cases was from an older H5N1 clade, 2.3.2.1c, which had circulated as a common H5N1 strain in Cambodia for many years, rather than the more recent clade 2.3.4.4b, which had caused mass poultry deaths since 2020. This older clade had jumped to humans in the past yet hadn't ...
Since arriving on a Texas dairy farm nearly a year ago, bird flu has caused havoc in the farming industry, leading to millions of dead birds and thousands of sick cows. More than 65 people have ...
While other H5N1 influenza strains are known, they are significantly different on a genetic level from a highly pathogenic, emergent strain of H5N1, which was able to achieve hitherto unprecedented global spread in 2008. [1] The H5N1 strain is a fast-mutating, highly pathogenic avian influenza virus (HPAI) found in multiple bird species. It is ...
Commonly referred to as bird flu, it’s a highly contagious viral disease affecting domestic poultry, wild birds, and, in some cases, mammals … including humans. The recent rise in Avian ...
As the bird flu continues to spread across the United States, this map show the extent of the outbreak. ... expected to increase from last year by about 20% in 2025, compared to about 2.2% for ...
A five-year-old boy from Luang Prabang Province tested positive after being exposed to poultry. [13] At least 16 isolated cases were reported in China between July and September 2021, including a case in a 26-year-old woman from Guilin who died. A 61-year-old woman who was infected in July has denied ever coming into contact with poultry.
A Louisiana patient hospitalized in critical condition with severe bird flu has died, the state health department said Monday, marking the first U.S. death due to the virus. The patient was older ...