The USDA announced the infection of dairy cows in Nevada with a new strain of H5N1 bird flu, separate from the ongoing B3.13 strain affecting herds. This finding signifies two separate spillovers of the virus from birds to cattle, suggesting a persistent risk not only to the livestock but also to those who work with them. Previously, it was unexpected to see cows susceptible to this virus, raising concerns among scientists about broader vulnerability of cattle to avian influenza infections.
What we've found is that H5N1 has spilled into cows at least twice, indicating a potential persistent risk to cows and the workers who care for them.
We need to now consider the possibility that cows are more broadly susceptible to these viruses than we initially thought, which is alarming.
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