A genetic mutation of the H5N1 bird flu virus—a mutation associated with increased infectiousness and disease severity—has been found in two cats, in what scientists say is another indication of the risks posed by the virus.
A genetic mutation of the H5N1 bird flu virus—a mutation associated with increased infectiousness and disease severity—has been found in two cats, in what scientists say is another indication of the risks posed by the virus.
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