I can’t speak for every country in Europe. But a quick Google search tells me in England “It is currently illegal to vaccinate birds in England unless they are in a zoo and that developing a suitable vaccine is some way off". I think the underlying issues is mutations. So they cull them or “stamp them out”. Anyways. Just shitposting.

I always thought many European countries vaccinated against salmonella. I could be wrong but I swear I read that many many years ago. I didn't Google. Just from a decade ago research memory.