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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.
A/H5N1 virus can also infect mammals (including humans) that have been exposed to infected birds; in these cases, symptoms are frequently severe or fatal. [2] A/H5N1 virus is shed in the saliva, mucus, and feces of infected birds; other infected animals may shed bird flu viruses in respiratory secretions and other body fluids (such as milk). [3]
The true fatality rate may be lower because some cases with mild symptoms may not have been identified as H5N1. [3] H5N1 infections in humans are generally caused by bird to human transmission of the virus. Until May 2006, the WHO estimate of the number of human to human transmissions had been "two or three cases".
61 cases of human bird flu in the U.S. in 2024. Since the start of 2024, human H5N1 bird flu cases have been reported in the following states, according to the latest CDC data: California: 34 ...
According to the U.S. Centers for Disease Control, there have been 57 cases of bird flu in humans this year, most from exposure to cattle or poultry. The virus is spreading among livestock and ...
Bird flu, a.k.a. H5N1, has dominated headlines in the U.S. for months. But while this illness is known worldwide for having a high mortality rate, the vast majority of infections in America have ...
A significant effect of H5N1 has been personal fear concerning the unknown, even by those most in-the-know. Dr. David Nabarro, chief avian flu coordinator for the United Nations, describes himself as "quite scared"; says avian flu has too many unanswered questions; and if the disease starts spreading to humans, borders will close, airports will ...
As H5N1 bird flu spreads among California dairy herds and southward-migrating birds, health officials announced Friday that six more human cases of infection: five in California and one in Oregon ...