Her World

Something was unleashed in 2023, some horrible disease that brought the dead back to life. The entire United States is in complete chaos. ONLY the U.S. though, there are stories that if you head North to reach Canada there are borders put up along with a Quarantine area to be allowed back into the world. That's right, No WW3. Instead, the zombie apocalypse was unleashed.
The rest of the world watches us terrified.
Scared that one day the barriers will fall and the rest of the world will be infected.