Has anyone ever watched the bonus features on ratatouille. It gives a long description on how black rats carried fleas that were causing the black plague. Then brown rats started killing and uprooting the black rat popu,ace and that's why we dont have that disease anymore.. thing I dont get.. if brown rats have long since cannibalized. Then what are the chances of a evolved form of the plague today.. or a mad rodent disease. Carring over to humans. More than likely it would be passed by a flea like the black rat.. but here's the kicker rats carry parasitic nanotodes. These can pass themselves through there fecal matter.. but parasitic nanotodes are found all over the world. Like the brown rat.. somthing to think about..