Comment by wongarsu

While that's correct, it doesn't alleviate any of the fears. Virus->Something transfer isn't relevant unless Anything->Virus transfer is also common (which doesn't appear to be the case?). Plant->Plant or Bacteria->Plant transfer are really the ones relevant to GMOs, and neither seem to be common. So we really can't say that genetic modification is just like what nature does, except for uncommon edge cases.