Not all of those will be the new strain. The regular strain seems to be capable of infecting minks on its own, where it wreaks havoc on the tightly packed popul

Not all of those will be the new strain. The regular strain seems to be capable of infecting minks on its own, where it wreaks havoc on the tightly packed population. The problem is that this adds an entirely different evolutionary pressure that can result in a markedly different virus, which in the worst case can jump back to humans. This is that worst case.