Well, the virus got from (presumably) humans to all of these other species, so it seems not too hard to imagine that it can go back the other way. In the case

Well, the virus got from (presumably) humans to all of these other species, so it seems not too hard to imagine that it can go back the other way. In the case of mink in Denmark, they were convinced that new variants that emerged first in the mink had made it back into the human population.