Wouldn't the seller have to have the vaccine to do that? I don't think the regular consumer can possess it.Agreed.
What I can’t decide on.. is what do breeders and show-ers do if mareks gets into their flock? Quit the business altogether to keep a closed flock indefinitely, or straight up lie and keep spreading it around?
Perhaps start selling only vaccinated birds, thus still probably spreading it around (and creating worse strains) but flying under the radar, so to speak?