It doesn't happen with Berberis—that example. Once it is known that a species can be an alternate host, it does not come in. This one in particular has been a bit of a project of mine, because there are new genetics within that species that are proven to not be a host. But CFIA says no, nothing more, we don't want risk like that.
And so it is with any new species: they undergo a pest risk analysis and—