I have to assume that a vaccine using legacy methods (let alone newer technology) would be easily achieved at this point, and that at least in humans, a possible outbreak could be blunted in under a year. So is it just not cost effective to do it for cattle? --- edit: leaving my original typed comment in place above. But I found this - https://texasfarmbureau.org/usda-approves-first-h5n1-vaccine...
https://drgnews.com/2024/10/23/south-dakota-company-to-test-...