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Amid an ongoing outbreak of bird flu among poultry and dairy cows, the United States has recorded its first human death due the virus known as avian influenza A or H5N1.
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.
Usually other differences also exist. Currently, there is no human-adapted form of H5N1 influenza, so all humans who have caught it so far have caught avian H5N1. Human flu symptoms usually include fever, cough, sore throat, muscle aches, conjunctivitis and, in severe cases, severe breathing problems and pneumonia that may be fatal.
Avian influenza, also known as avian flu or bird flu, is a disease caused by the influenza A virus, which primarily affects birds but can sometimes affect mammals including humans. [1] Wild aquatic birds are the primary host of the influenza A virus, which is enzootic (continually present) in many bird populations.
The newer variant of avian influenza that recently infected dairy cattle in Nevada has a genetic change that’s thought to help the virus copy itself in mammals — including humans — more ...
Avian flu has been around and infecting wild birds and poultry since 1996. There have been nearly 1,000 known cases of bird flu in humans (889 between 2003 and May 3, 2024, according to the World ...
A malignant flu may soon spread from birds to infect and kill humans. Scientists fear a mammal-to-mammal transmission could lead to global catastrophe. ... The H5N1 avian influenza is notorious ...
In mammals, including humans, A/H5N1 influenza (whether LPAI or HPAI) is rare. Symptoms of infection vary from mild to severe, including fever, diarrhoea, and cough. [6] Human infections with A/H5N1 virus have been reported in 23 countries since 1997, resulting in severe pneumonia and death in about 50% of cases. [9]