We've only really investigated at that degree of detail for one virus, and that was the piscine orthoreovirus. It's the one that's been in the media many times, related to the heart and skeletal muscle inflamation disease. We have done a very careful genetic study of its origin, where it's from, and whether it's being exchanged with salmon farms.
That research is the basis for my answering to a previous question that yes, the assessment of the Pacific Salmon Foundation and the strategic salmon health initiative is that there is more than minimal harm and that the PRV's origin is in the European Atlantic area. We believe it came over approximately 30 years ago. That, by coincidence, puts it in close relationship to the development of salmon aquaculture.
In this one instance, then, in which we've been able to do this study, it does actually unfold in that way.