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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. For example, if there are 100 confirmed cases of a disease and 50 die as a consequence, then the CFR is 50%.
However, many experts say the H5N1 case fatality rate — which estimates the proportion of deaths among people diagnosed — has some caveats. "We have to look at (these numbers) carefully," says ...
Bird flu (H5N1) continues to spark warnings around the country. On Friday, ... Previous iterations of bird flu have had a 50% death rate in humans, Siegel noted, but the 61 human cases in the U.S ...
The first person to have a severe case of H5N1 bird flu in the United States has ... This is the first human death from bird flu in the US. ... That would give the virus a 50% case fatality rate ...
The true fatality rate may be lower because some cases with mild symptoms may not have been identified as H5N1. [ 7 ] Confirmed human cases and mortality rate of avian influenza ( H5N1 ) 2003–2024
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 global case fatality rate from COVID-19 is approximately 1.4%; however, the global case fatality rate from H5N1, a viral infection, is approximately 52%. ... not after there is raging human-to ...
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."