Ok, interesting. But there's a huge issue of selection bias here. We're interested in this virus precisely because it poses a threat to humans, so obviously it'

Ok, interesting. But there's a huge issue of selection bias here. We're interested in this virus precisely because it poses a threat to humans, so obviously it's adapted to humans. As a biologist, I therefore think this does not mean much at all. ;) At least not without a more quantitative treatment of the claim that "this implies a very long period of transmission in human cells". Thanks for posting this though!