It is quite possible. However, our colleagues—not CFIA but the provincial governments—actually have surveillance programs. In this case, the B.C. government has decided to do a surveillance of these farms and see if there are any cases of bovine TB.
At this time, and even last time, we have tried to do the trace-ins. Given that cases of bovine TB are so rare now, it's like trying to find a needle in a haystack, but we still want to go and look at all the theories of where this may have come from.