Then the fleas are eventually going to affect more humans. Those humans that are affected are going to start running away from those areas and spreading the fleas with them. And we're going to talk about some of the other contributing factors that are going to make it much, much worse. But by 1348 it's going to reach Great Britain. By 1349 and 1350 it's going to reach the Scandinavian countries and eventually it's going to make its way back to the east into Russia by 1351. And it's important to say it's not just going to affect Europe. It's thought that there's probably 25 or 30 million Chinese that died before the plague even reached Europe.